extras/audio/src/main/java/com/stanfy/enroscar/audio/audio/StreamingPlaybackController.java
protected final void dropListener() {
    if (DEBUG) { Log.v(TAG, "Drop listener"); }
    if (streamingPlayback != null) {
      try {
        streamingPlayback.removeListener();
      } catch (final RemoteException e) {
        Log.e(TAG, "Cannot remove listener", e);
      }
      bindRequested = false;
    }
  }
protected final void dropListener() {
    if (DEBUG) { Log.v(TAG, "Drop listener"); }
    if (streamingPlayback != null) {
      try {
        streamingPlayback.removeListener();
      } catch (final RemoteException e) {
        Log.e(TAG, "Cannot remove listener", e);
      }
      bindRequested = false;
    }
  }
Drop streaming service listener.