Add @DoNotStrip annotation to getJavaModule

Summary:
For some reason, I think this method is being optimized away, which is really strange considering that it's being used in getModule.

Changelog:
[Internal]

Reviewed By: ejanzer

Differential Revision: D19454855

fbshipit-source-id: 414b4888f7aacf730dd22939e2e2140b94dff4e7

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

@@ -56,6 +56,7 @@ public class TurboModuleManager implements JSIModule, TurboModuleRegistry {
     return mTurbomoduleManagerDelegate.getEagerInitModuleNames();
   }
 
+  @DoNotStrip
   @Nullable
   private TurboModule getJavaModule(String name) {
     if (!mTurboModules.containsKey(name)) {