Allow overflow scroll to clip the view instead of let it be visible

Summary:
When the overflow style set to 'scroll', React ViewGroup does nothing to the container. Instead it should be clipped just like hidden.

Changelog:
[Android][Changed] - Setting `overflow: scroll` in View component style will clip the children in the View container

Reviewed By: javache

Differential Revision: D31350605

fbshipit-source-id: e0d618f5e872fec9cf9ecb2d4cfe7af9a2f3c063

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewGroup.java

@@ -786,6 +786,7 @@ public class ReactViewGroup extends ViewGroup
           }
           break;
         case ViewProps.HIDDEN:
+        case ViewProps.SCROLL:
           float left = 0f;
           float top = 0f;
           float right = getWidth();