Revert "WebRTC-DeprecateGlobalFieldTrialString/Enabled/ - part 14/inf"

This reverts commit f177081eeeab64658fb560b6e8cb235620ac4a1a.

Reason for revert: breaks downstream project

Original change's description:
> WebRTC-DeprecateGlobalFieldTrialString/Enabled/ - part 14/inf
>
> This cl/ passes field trials all the way from c++
> to the android NetworkMonitorAutoDetect.java
>
> Bug: webrtc:10335
> Change-Id: Ic6842612eed36b684340f0f78f4087bee249cc50
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/257081
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Florent Castelli <orphis@webrtc.org>
> Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#36498}

Bug: webrtc:10335
Change-Id: I8d881ea3f50cf4affde65800d759885b2581c6be
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258482
Reviewed-by: Jonas Oreland <jonaso@google.com>
Owners-Override: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#36500}

sdk/android/api/org/webrtc/NetworkChangeDetectorFactory.java

@@ -13,6 +13,5 @@ package org.webrtc;
 import android.content.Context;
 
 public interface NetworkChangeDetectorFactory {
-  public NetworkChangeDetector create(
-      NetworkChangeDetector.Observer observer, Context context, String fieldTrialsString);
+  public NetworkChangeDetector create(NetworkChangeDetector.Observer observer, Context context);
 }

sdk/android/api/org/webrtc/NetworkMonitor.java

@@ -46,8 +46,8 @@ public class NetworkMonitor {
       new NetworkChangeDetectorFactory() {
         @Override
         public NetworkChangeDetector create(
-            NetworkChangeDetector.Observer observer, Context context, String fieldTrialsString) {
-          return new NetworkMonitorAutoDetect(observer, context, fieldTrialsString);
+            NetworkChangeDetector.Observer observer, Context context) {
+          return new NetworkMonitorAutoDetect(observer, context);
         }
       };
 
@@ -101,26 +101,20 @@ public class NetworkMonitor {
    * multi-networking. This requires the embedding app have the platform ACCESS_NETWORK_STATE and
    * CHANGE_NETWORK_STATE permission.
    */
-  public void startMonitoring(Context applicationContext, String fieldTrialsString) {
+  public void startMonitoring(Context applicationContext) {
     synchronized (networkChangeDetectorLock) {
       ++numObservers;
       if (networkChangeDetector == null) {
-        networkChangeDetector = createNetworkChangeDetector(applicationContext, fieldTrialsString);
+        networkChangeDetector = createNetworkChangeDetector(applicationContext);
       }
       currentConnectionType = networkChangeDetector.getCurrentConnectionType();
     }
   }
 
-  /** Deprecated, use startMonitoring with fieldTrialsStringString argument. */
-  @Deprecated
-  public void startMonitoring(Context applicationContext) {
-    startMonitoring(applicationContext, "");
-  }
-
   /** Deprecated, pass in application context in startMonitoring instead. */
   @Deprecated
   public void startMonitoring() {
-    startMonitoring(ContextUtils.getApplicationContext(), "");
+    startMonitoring(ContextUtils.getApplicationContext());
   }
 
   /**
@@ -129,15 +123,11 @@ public class NetworkMonitor {
    * CHANGE_NETWORK_STATE permission.
    */
   @CalledByNative
-  private void startMonitoring(
-      @Nullable Context applicationContext, long nativeObserver, String fieldTrialsString) {
-    Logging.d(TAG,
-        "Start monitoring with native observer " + nativeObserver
-            + " fieldTrialsString: " + fieldTrialsString);
+  private void startMonitoring(@Nullable Context applicationContext, long nativeObserver) {
+    Logging.d(TAG, "Start monitoring with native observer " + nativeObserver);
 
     startMonitoring(
-        applicationContext != null ? applicationContext : ContextUtils.getApplicationContext(),
-        fieldTrialsString);
+        applicationContext != null ? applicationContext : ContextUtils.getApplicationContext());
     // The native observers expect a network list update after they call startMonitoring.
     synchronized (nativeNetworkObservers) {
       nativeNetworkObservers.add(nativeObserver);
@@ -187,8 +177,7 @@ public class NetworkMonitor {
     return currentConnectionType;
   }
 
-  private NetworkChangeDetector createNetworkChangeDetector(
-      Context appContext, String fieldTrialsString) {
+  private NetworkChangeDetector createNetworkChangeDetector(Context appContext) {
     return networkChangeDetectorFactory.create(new NetworkChangeDetector.Observer() {
       @Override
       public void onConnectionTypeChanged(NetworkChangeDetector.ConnectionType newConnectionType) {
@@ -210,7 +199,7 @@ public class NetworkMonitor {
           List<NetworkChangeDetector.ConnectionType> types, int preference) {
         notifyObserversOfNetworkPreference(types, preference);
       }
-    }, appContext, fieldTrialsString);
+    }, appContext);
   }
 
   private void updateCurrentConnectionType(NetworkChangeDetector.ConnectionType newConnectionType) {
@@ -350,11 +339,10 @@ public class NetworkMonitor {
   }
 
   // For testing only.
-  static NetworkMonitorAutoDetect createAndSetAutoDetectForTest(
-      Context context, String fieldTrialsString) {
+  static NetworkMonitorAutoDetect createAndSetAutoDetectForTest(Context context) {
     NetworkMonitor networkMonitor = getInstance();
     NetworkChangeDetector networkChangeDetector =
-        networkMonitor.createNetworkChangeDetector(context, fieldTrialsString);
+        networkMonitor.createNetworkChangeDetector(context);
     networkMonitor.networkChangeDetector = networkChangeDetector;
     return (NetworkMonitorAutoDetect) networkChangeDetector;
   }

sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java

@@ -176,29 +176,26 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver implements Netwo
     private final boolean requestVPN;
     private final boolean includeOtherUidNetworks;
 
-    ConnectivityManagerDelegate(
-        Context context, Set<Network> availableNetworks, String fieldTrialsString) {
+    ConnectivityManagerDelegate(Context context, Set<Network> availableNetworks) {
       this((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE),
-          availableNetworks, fieldTrialsString);
+          availableNetworks,
+          PeerConnectionFactory.fieldTrialsFindFullName("WebRTC-NetworkMonitorAutoDetect"));
     }
 
     @VisibleForTesting
     ConnectivityManagerDelegate(ConnectivityManager connectivityManager,
-        Set<Network> availableNetworks, String fieldTrialsString) {
+        Set<Network> availableNetworks, String fieldTrials) {
       this.connectivityManager = connectivityManager;
       this.availableNetworks = availableNetworks;
-      this.getAllNetworksFromCache =
-          checkFieldTrial(fieldTrialsString, "getAllNetworksFromCache", false);
-      this.requestVPN = checkFieldTrial(fieldTrialsString, "requestVPN", false);
-      this.includeOtherUidNetworks =
-          checkFieldTrial(fieldTrialsString, "includeOtherUidNetworks", false);
+      this.getAllNetworksFromCache = checkFieldTrial(fieldTrials, "getAllNetworksFromCache", false);
+      this.requestVPN = checkFieldTrial(fieldTrials, "requestVPN", false);
+      this.includeOtherUidNetworks = checkFieldTrial(fieldTrials, "includeOtherUidNetworks", false);
     }
 
-    private static boolean checkFieldTrial(
-        String fieldTrialsString, String key, boolean defaultValue) {
-      if (fieldTrialsString.contains(key + ":true")) {
+    private static boolean checkFieldTrial(String fieldTrials, String key, boolean defaultValue) {
+      if (fieldTrials.contains(key + ":true")) {
         return true;
-      } else if (fieldTrialsString.contains(key + ":false")) {
+      } else if (fieldTrials.contains(key + ":false")) {
         return false;
       }
       return defaultValue;
@@ -638,12 +635,10 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver implements Netwo
 
   /** Constructs a NetworkMonitorAutoDetect. Should only be called on UI thread. */
   @SuppressLint("NewApi")
-  public NetworkMonitorAutoDetect(
-      NetworkChangeDetector.Observer observer, Context context, String fieldTrialsString) {
+  public NetworkMonitorAutoDetect(NetworkChangeDetector.Observer observer, Context context) {
     this.observer = observer;
     this.context = context;
-    connectivityManagerDelegate =
-        new ConnectivityManagerDelegate(context, availableNetworks, fieldTrialsString);
+    connectivityManagerDelegate = new ConnectivityManagerDelegate(context, availableNetworks);
     wifiManagerDelegate = new WifiManagerDelegate(context);
 
     final NetworkState networkState = connectivityManagerDelegate.getNetworkState();