enableAudio method
Implementation
Future<void> enableAudio(String sessionId, {bool? enable, double? userId}) async {
  Map<String, Object> values = Map();
  values["sessionId"] = sessionId;
  if (enable != null) {
    values["enable"] = enable;
  }
  if (userId != null) {
    values["userId"] = userId;
  }
  await _webRtcModule.invokeMethod(ENABLE_AUDIO_METHOD, values);
}