hangup method
Implementation
Future<NEResult> hangup() async {
final result = await NECallEngine.instance.hangup();
CallKitUILog.i(_tag, 'hangup result = $result');
CallState.instance.selfUser.callStatus = NECallStatus.none;
NECallKitPlatform.instance.updateCallStateToNative();
CallState.instance.cleanState();
return NEResult(code: result.code, message: result.msg);
}