Add extra debug information in CreateMountItem class

Summary: Easy diff to add extra debug information in the CreateMountItem class. This will be useful to debug bugs in Fabric

Reviewed By: JoshuaGross

Differential Revision: D16381362

fbshipit-source-id: 22073df228908b6c88e6423c4917fc6d64c73f98

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

@@ -37,6 +37,13 @@ public class CreateMountItem implements MountItem {
 
   @Override
   public String toString() {
-    return "CreateMountItem [" + mReactTag + "]";
+    return "CreateMountItem ["
+        + mReactTag
+        + "] - component: "
+        + mComponent
+        + " - rootTag: "
+        + mRootTag
+        + " - isLayoutable: "
+        + mIsLayoutable;
   }
 }