Remove litho observer

Summary:
There seem to be a number of issues with registering to all changes properly for litho observer.

Removing it and allowing the decor view to do a full traversal fixes a number of problems. The performance with hardware rendering seems to be fine. This should be  stopgap untill we tackle time travel properly

Reviewed By: lblasa

Differential Revision: D41304501

fbshipit-source-id: 5b7cdbd0dac04ba0dbf8dd5e449c99f0db4d0863

android/plugins/litho/src/main/java/com/facebook/flipper/plugins/uidebugger/litho/UIDebuggerLithoSupport.kt

@@ -26,7 +26,5 @@ object UIDebuggerLithoSupport {
     register.register(MatrixDrawable::class.java, MatrixDrawableDescriptor)
   }
 
-  fun addObserver(observerFactory: TreeObserverFactory) {
-    observerFactory.register(LithoViewTreeObserverBuilder)
-  }
+  fun addObserver(observerFactory: TreeObserverFactory) {}
 }