Set layout metrics during initial render of Fabric

Summary:
This diff refactors the initial render of Fabric in order to set the layout metrics as we start the surface.

This prevents to create an additional fabric commit during initial render. Also this migth help fixing T63495589 (I wasn't able to repro T63495589 again when using this diff)

changelog: [Internal][Android] Internal change to reduce the amount of commits during initial render of Fabric

Reviewed By: JoshuaGross

Differential Revision: D21330072

fbshipit-source-id: 758c49b52ea4c12d5623b7c7d68c7318f4a6cd83

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIManagerModule.java

@@ -425,6 +425,16 @@ public class UIManagerModule extends ReactContextBaseJavaModule
     return tag;
   }
 
+  @Override
+  public <T extends View> int startSurface(
+      final T rootView,
+      final String moduleName,
+      final WritableMap initialProps,
+      int widthMeasureSpec,
+      int heightMeasureSpec) {
+    throw new UnsupportedOperationException();
+  }
+
   /** Unregisters a new root view. */
   @ReactMethod
   public void removeRootView(int rootViewTag) {