Add base class NetworkPredictor and NetworkPredictorFactory and wire up.

Add base class NetworkPredictor and NetworkPredictorFactory in /api, make it possible to inject customized NetworkPredictor in PeerConnectionFactory level. The NetworkPredictor object will be pass down to GoogCCNetworkControl and DelayBasedBwe.

Bug: webrtc:10492
Change-Id: Iceeadbe1c9388b11ce4ac01ee56554cb0bf64d04
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130201
Commit-Queue: Ying Wang <yinwa@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27543}

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

@@ -0,0 +1,20 @@
+/*
+ *  Copyright 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.webrtc;
+
+/** Factory for creating webrtc::NetworkStatePredictorFactory instances. */
+public interface NetworkStatePredictorFactoryFactory {
+  /**
+   * Dynamically allocates a webrtc::NetworkStatePredictorFactory instance and returns a pointer to
+   * it. The caller takes ownership of the object.
+   */
+  public long createNativeNetworkStatePredictorFactory();
+}

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

@@ -173,6 +173,7 @@ public class PeerConnectionFactory {
     @Nullable private VideoDecoderFactory videoDecoderFactory;
     @Nullable private AudioProcessingFactory audioProcessingFactory;
     @Nullable private FecControllerFactoryFactoryInterface fecControllerFactoryFactory;
+    @Nullable private NetworkStatePredictorFactoryFactory networkStatePredictorFactoryFactory;
     @Nullable private MediaTransportFactoryFactory mediaTransportFactoryFactory;
 
     private Builder() {}
@@ -232,6 +233,12 @@ public class PeerConnectionFactory {
       return this;
     }
 
+    public Builder NetworkStatePredictorFactoryFactory(
+        NetworkStatePredictorFactoryFactory networkStatePredictorFactoryFactory) {
+      this.networkStatePredictorFactoryFactory = networkStatePredictorFactoryFactory;
+      return this;
+    }
+
     /** Sets a MediaTransportFactoryFactory for a PeerConnectionFactory. */
     public Builder setMediaTransportFactoryFactory(
         MediaTransportFactoryFactory mediaTransportFactoryFactory) {
@@ -252,6 +259,9 @@ public class PeerConnectionFactory {
           videoDecoderFactory,
           audioProcessingFactory == null ? 0 : audioProcessingFactory.createNative(),
           fecControllerFactoryFactory == null ? 0 : fecControllerFactoryFactory.createNative(),
+          networkStatePredictorFactoryFactory == null
+              ? 0
+              : networkStatePredictorFactoryFactory.createNativeNetworkStatePredictorFactory(),
           mediaTransportFactoryFactory == null
               ? 0
               : mediaTransportFactoryFactory.createNativeMediaTransportFactory());
@@ -575,7 +585,8 @@ public class PeerConnectionFactory {
       Options options, long nativeAudioDeviceModule, long audioEncoderFactory,
       long audioDecoderFactory, VideoEncoderFactory encoderFactory,
       VideoDecoderFactory decoderFactory, long nativeAudioProcessor,
-      long nativeFecControllerFactory, long mediaTransportFactory);
+      long nativeFecControllerFactory, long nativeNetworkStatePredictorFactory,
+      long mediaTransportFactory);
 
   private static native long nativeCreatePeerConnection(long factory,
       PeerConnection.RTCConfiguration rtcConfig, MediaConstraints constraints, long nativeObserver,