Ez Extend logging of Fabric

Summary:
Quick diff to log of content of UpdateState mount item. This is useful for debugging. Note this will ONLY be logged when the constant FabricUIManager.IS_DEVELOPMENT_ENVIRONMENT is set to true

changelog: [Internal][Android] internal log for fabric android

Reviewed By: JoshuaGross

Differential Revision: D21428345

fbshipit-source-id: d000eb6dbdd39d15935fa2102072790e17372682

ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/mountitems/UpdateStateMountItem.java

@@ -35,7 +35,7 @@ public String toString() {
         new StringBuilder("UpdateStateMountItem [").append(mReactTag).append("]");
 
     if (IS_DEVELOPMENT_ENVIRONMENT) {
-      result.append(" state: ").append(mStateWrapper != null ? mStateWrapper : "<null>");
+      result.append(" state: ").append(mStateWrapper != null ? mStateWrapper.getState() : "<null>");
     }
 
     return result.toString();