Only create TurboModule jsi::HostObject if Java module is non-null

Summary:
## Summary
If the Java instance of a TurboModule is null, then the resultant JS object returned from `TurboModuleRegistry` should also be null.

Reviewed By: mdvacca

Differential Revision: D15253476

fbshipit-source-id: 83a6b9aa97b547aeecf9b285986ad0f5b9e413da

ReactAndroid/src/main/java/com/facebook/react/turbomodule/core/jni/jsireact/TurboModuleManager.cpp

@@ -62,7 +62,12 @@ void TurboModuleManager::installJSIBindings() {
         }
 
         const auto moduleInstance = getJavaModule(name);
-        return turboModuleManagerDelegate_->cthis()->getTurboModule(name, moduleInstance, jsCallInvoker_);
+
+        if (moduleInstance) {
+          return turboModuleManagerDelegate_->cthis()->getTurboModule(name, moduleInstance, jsCallInvoker_);
+        }
+
+        return std::shared_ptr<TurboModule>(nullptr);
       })
   );
 }