Improve removeClippedSubviews for overflowing views

Summary:
Historically, removeClippedSubviews for Nodes would not clip views
that overflowed their parent. This patch changes that, so that Nodes can
properly clip views when they are off screen (even if they have descendants
that overflow the bounds of their parent).

This is done by calculating a set of offsets from the actual width and
height of the view, and using those in the clipping calculations.

Reviewed By: sriramramani

Differential Revision: D3409859

ReactAndroid/src/main/java/com/facebook/react/flat/FlatNativeViewHierarchyManager.java

@@ -13,6 +13,7 @@ import javax.annotation.Nullable;
 
 import java.util.Collection;
 
+import android.graphics.Rect;
 import android.view.View;
 import android.view.View.MeasureSpec;
 import android.view.ViewGroup;
@@ -67,10 +68,10 @@ import com.facebook.react.uimanager.ViewManagerRegistry;
       @Nullable DrawCommand[] drawCommands,
       @Nullable AttachDetachListener[] listeners,
       @Nullable NodeRegion[] nodeRegions,
-      boolean hasOverflowingElements) {
+      Rect logicalAdjustment) {
     FlatViewGroup view = (FlatViewGroup) resolveView(reactTag);
     if (drawCommands != null) {
-      view.mountDrawCommands(drawCommands, hasOverflowingElements);
+      view.mountDrawCommands(drawCommands, logicalAdjustment);
     }
     if (listeners != null) {
       view.mountAttachDetachListeners(listeners);