code: private void aSysnCallback(final int rstCode, final IClientConnectCallback callback) {
          ThreadUtil.INST.excute(new Runnable() {
              @Override
              public void run() {
                  HuaweiApiClient client =  getApiClient();
                  HMSAgentLog.d("callback connect: rst=" + rstCode + " apiClient=" + client);
                  callback.onConnect(rstCode, client);
              }
          });
      }
docs: 起线程回调各个接口，避免其中一个回调者耗时长影响其他调用者
  @param rstCode 结果码
  @param callback 回调