Fix bug in Android elevation implementation

Summary:
If border radius is not set or is zero, then elevation will not
work properly. This bug seems to have been introduced when the
style in facebook#4180 was modified slightly to
produce commit b65f1f2.
Closes facebook#4555

Reviewed By: svcscm

Differential Revision: D2741203

Pulled By: mkonicek

fb-gh-sync-id: f4ee9ccdfc64374d58824a6e988409ac2b7532a4

Author: sduddikunta

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

@@ -138,7 +138,7 @@ public void getOutline(Outline outline) {
               : 0;
       outline.setRoundRect(getBounds(), mBorderRadius + extraRadiusFromBorderWidth);
     } else {
-      super.getOutline(outline);
+      outline.setRect(getBounds());
     }
   }