Reland "Reland "Delete old Android ADM.""

This reverts commit 38a28603fd7b2eec46a362105b225dd6f08b4137.

Reason for revert: Attempt to reland, now that WebRTC dependency cycle has been broken.

Original change's description:
> Revert "Reland "Delete old Android ADM.""
>
> This reverts commit 6e4d7e606c4327eaa9298193e22794fcb9b30218.
>
> Reason for revert: Still breaks downstream build (though in a different way this time)
>
> Original change's description:
> > Reland "Delete old Android ADM."
> >
> > This is a reland of commit 4ec3e9c98873520b3171d40ab0426b2f05edbbd2
> >
> > Original change's description:
> > > Delete old Android ADM.
> > >
> > > The schedule move Android ADM code to sdk directory have been around
> > > for several years, but the old code still not delete.
> > >
> > > Bug: webrtc:7452
> > > Change-Id: I0f75c680f71f0b2ce614de6cbd9f124c2a59d453
> > > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/264620
> > > Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
> > > Commit-Queue: Henrik Andreassson <henrika@webrtc.org>
> > > Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
> > > Cr-Commit-Position: refs/heads/main@{#37174}
> >
> > Bug: webrtc:7452
> > Change-Id: Icabad23e72c8258a854b7809a93811161517266c
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265872
> > Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
> > Commit-Queue: Björn Terelius <terelius@webrtc.org>
> > Cr-Commit-Position: refs/heads/main@{#37236}
>
> Bug: webrtc:7452
> Change-Id: Ide8fbd55fadd7aed9989053afff7c63c04f1320f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266023
> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Björn Terelius <terelius@webrtc.org>
> Owners-Override: Björn Terelius <terelius@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#37242}

Bug: webrtc:7452
Change-Id: I6946d0fc28cf4c08387e451e6a07765f7410ce7c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266980
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37356}

sdk/android/src/java/org/webrtc/ApplicationContextProvider.java

@@ -0,0 +1,20 @@
+/*
+ *  Copyright (c) 2018 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;
+
+import android.content.Context;
+
+public class ApplicationContextProvider {
+  @CalledByNative
+  public static Context getApplicationContext() {
+    return ContextUtils.getApplicationContext();
+  }
+}

sdk/android/src/java/org/webrtc/audio/WebRtcAudioManager.java

@@ -55,11 +55,13 @@ class WebRtcAudioManager {
         : getMinInputFrameSize(sampleRate, numberOfInputChannels);
   }
 
-  private static boolean isLowLatencyOutputSupported(Context context) {
+  @CalledByNative
+  static boolean isLowLatencyOutputSupported(Context context) {
     return context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUDIO_LOW_LATENCY);
   }
 
-  private static boolean isLowLatencyInputSupported(Context context) {
+  @CalledByNative
+  static boolean isLowLatencyInputSupported(Context context) {
     // TODO(henrika): investigate if some sort of device list is needed here
     // as well. The NDK doc states that: "As of API level 21, lower latency
     // audio input is supported on select devices. To take advantage of this

sdk/android/src/jni/audio_device/audio_device_module.cc

@@ -633,6 +633,14 @@ void GetAudioParameters(JNIEnv* env,
   RTC_CHECK(output_parameters->is_valid());
 }
 
+bool IsLowLatencyInputSupported(JNIEnv* env, const JavaRef<jobject>& j_context) {
+  return Java_WebRtcAudioManager_isLowLatencyInputSupported(env, j_context);
+}
+
+bool IsLowLatencyOutputSupported(JNIEnv* env, const JavaRef<jobject>& j_context) {
+  return Java_WebRtcAudioManager_isLowLatencyOutputSupported(env, j_context);
+}
+
 rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceModuleFromInputAndOutput(
     AudioDeviceModule::AudioLayer audio_layer,
     bool is_stereo_playout_supported,

sdk/android/src/jni/audio_device/audio_device_module.h

@@ -86,6 +86,10 @@ void GetAudioParameters(JNIEnv* env,
                         AudioParameters* input_parameters,
                         AudioParameters* output_parameters);
 
+bool IsLowLatencyInputSupported(JNIEnv* env, const JavaRef<jobject>& j_context);
+
+bool IsLowLatencyOutputSupported(JNIEnv* env, const JavaRef<jobject>& j_context);
+
 // Glue together an audio input and audio output to get an AudioDeviceModule.
 rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceModuleFromInputAndOutput(
     AudioDeviceModule::AudioLayer audio_layer,