!1980 只解决binder缓存消息上送死锁问题

Merge pull request !1980 from 万欣/master

device_info/device_info_stub.cpp

@@ -49,6 +49,7 @@ static const int DEVICE_INFO_EXIT_TIMEOUT_MS = 3;
 
 static void UnloadDeviceInfoSa(int signo)
 {
+    {
         std::unique_lock<std::mutex> lock(g_lock);
         time_t currTime;
         (void)time(&currTime);
@@ -56,6 +57,7 @@ static void UnloadDeviceInfoSa(int signo)
             alarm(DEVICE_INFO_EXIT_TIMEOUT_MS / 3); // 3 half
             return;
         }
+    }
     DINFO_LOGI("DeviceInfoService::UnloadDeviceInfoSa");
     auto sam = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
     DINFO_CHECK(sam != nullptr, return, "GetSystemAbilityManager return null");