toggleAudio method

Implementation

bool toggleAudio() {
  if (stream != null) {
    final audioTrack = stream?.getAudioTracks()[0];
    if (audioTrack != null) {
      final bool audioEnabled = audioTrack.enabled = !audioTrack.enabled;
      this.audioEnabled = audioEnabled;
      sendMessage('audio-toggle', {
        'userId': userId,
        'audioEnabled': audioEnabled,
      });
      return audioEnabled;
    }
  }
  return false;
}