selectAudioOutput method
Implementation
Future<void> selectAudioOutput() async {
var devices = await navigator.mediaDevices.enumerateDevices();
var audioDevices = devices.where((device) => device.kind == 'audiooutput');
await _remoteRTCVideoRenderer.audioOutput(audioDevices.first.deviceId);
_selectAudioInput(audioDevices.first.deviceId);
}