Update.

Author: cloudwebrtc

android/src/main/java/com/cloudwebrtc/webrtc/FlutterWebRTCPlugin.java

@@ -357,14 +357,12 @@ public void onMethodCall(MethodCall call, Result notSafeResult) {
             mediaStreamTrackSetVolume(trackId, volume);
             result.success(null);
         } else if (call.method.equals("setMicrophoneMute")) {
-            String trackId = call.argument("trackId");
             boolean mute = call.argument("mute");
-            mediaStreamTrackSetMicrophoneMute(trackId, mute);
+            rtcAudioManager.setMicrophoneMute(mute);
             result.success(null);
         } else if (call.method.equals("enableSpeakerphone")) {
-            String trackId = call.argument("trackId");
             boolean enable = call.argument("enable");
-            mediaStreamTrackEnableSpeakerphone(trackId, enable);
+            rtcAudioManager.setSpeakerphoneOn(enabled);
             result.success(null);
         } else if(call.method.equals("getDisplayMedia")) {
             Map<String, Object> constraints = call.argument("constraints");
@@ -965,18 +963,6 @@ public void mediaStreamTrackSetVolume(final String id, final double volume) {
         }
     }
 
-    public void mediaStreamTrackSetMicrophoneMute(final String id, boolean mute) {
-        try {
-            audioDeviceModule.setMicrophoneMute(mute);
-        } catch (Exception e) {
-            Log.e(TAG, "setMicrophoneMute(): error", e);
-        }
-    }
-
-    public void mediaStreamTrackEnableSpeakerphone(final String id, boolean enabled) {
-        rtcAudioManager.selectAudioDevice(enabled? RTCAudioManager.AudioDevice.SPEAKER_PHONE : RTCAudioManager.AudioDevice.EARPIECE);
-    }
-
     public void mediaStreamAddTrack(final String streaemId, final String trackId, Result result) {
         MediaStream mediaStream = localStreams.get(streaemId);
         if (mediaStream != null) {

android/src/main/java/com/cloudwebrtc/webrtc/utils/RTCAudioManager.java

@@ -403,7 +403,7 @@ private void unregisterReceiver(BroadcastReceiver receiver) {
   }
 
   /** Sets the speaker phone mode. */
-  private void setSpeakerphoneOn(boolean on) {
+  public void setSpeakerphoneOn(boolean on) {
     boolean wasOn = audioManager.isSpeakerphoneOn();
     if (wasOn == on) {
       return;
@@ -412,7 +412,7 @@ private void setSpeakerphoneOn(boolean on) {
   }
 
   /** Sets the microphone mute state. */
-  private void setMicrophoneMute(boolean on) {
+  public void setMicrophoneMute(boolean on) {
     boolean wasMuted = audioManager.isMicrophoneMute();
     if (wasMuted == on) {
       return;