Fix initHybrid app-crashing bug

Summary: We're seeing some cases of initHybrid failing when the C++ class hasn't been registered. I don't think we should be attempting to init in these cases, so gating it by the same logic as when we load the static library.

Reviewed By: priteshrnandgaonkar

Differential Revision: D18658101

fbshipit-source-id: b29592135dcf637a8c0d40aee30e383f4f35e527

android/src/main/java/com/facebook/flipper/android/EventBase.java

@@ -21,7 +21,9 @@ class EventBase extends HybridClassBase {
   }
 
   EventBase() {
-    initHybrid();
+    if (BuildConfig.IS_INTERNAL_BUILD) {
+      initHybrid();
+    }
   }
 
   @DoNotStrip