addAdvancedMsgListener method
添加高级消息的事件监听器
Implementation
@override
Future<String> addAdvancedMsgListener({
required V2TimAdvancedMsgListener listener,
}) async {
final String uuid = Utils.generateUniqueString();
advancedMsgListenerList[uuid] = listener;
await _channel.invokeMethod("addAdvancedMsgListener", buildMessageMangerParam({"listenerUuid": uuid}));
return uuid;
}