Ensure runtime established before created contextContainer (#24176)

Summary:
Ensure bridge finished initialize before we access runtime.
cc. shergin.

[iOS] [Fixed] - Ensure runtime established before created contextContainer
Pull Request resolved: https://github.com/facebook/react-native/pull/24176

Differential Revision: D14660690

Pulled By: shergin

fbshipit-source-id: 1d4237a0a344abf32d52243e46f92e346a63e3da

React/Fabric/RCTSurfacePresenter.mm

@@ -221,6 +221,11 @@ using namespace facebook::react;
   _contextContainer->registerInstance(_reactNativeConfig, "ReactNativeConfig");
 
   auto messageQueueThread = _batchedBridge.jsMessageThread;
+  if (messageQueueThread) {
+    // Make sure initializeBridge completed
+    messageQueueThread->runOnQueueSync([] {});
+  }
+  
   auto runtime = (facebook::jsi::Runtime *)((RCTCxxBridge *)_batchedBridge).runtime;
 
   RuntimeExecutor runtimeExecutor =