Android: Remove IsCommunicationModeEnabled() from AudioManager

This method is only used for logging and is blocking further refactoring
work. Once the refactoring and cleanup of the external AudioDeviceModule
is complete, we can revisit what logging we want and need and add it in
a cleaner way.

Bug: webrtc:7452
Change-Id: If08bcfb37860e9e7b9b5105cb75f748b53775f69
Reviewed-on: https://webrtc-review.googlesource.com/65460
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Paulina Hensman <phensman@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22678}

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

@@ -128,11 +128,6 @@ class WebRtcAudioManager {
     volumeLogger.stop();
   }
 
-  @CalledByNative
-  private boolean isCommunicationModeEnabled() {
-    return (audioManager.getMode() == AudioManager.MODE_IN_COMMUNICATION);
-  }
-
   // Returns true if low-latency audio output is supported.
   public static boolean isLowLatencyOutputSupported(Context context) {
     return context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUDIO_LOW_LATENCY);