Keep elevation during the Folder clip animation.

Change-Id: Id2a60de89d5f0fdf6a1173a08a89b9e95e757ea4

src/com/android/launcher3/anim/RoundedRectRevealOutlineProvider.java

@@ -42,7 +42,7 @@ public class RoundedRectRevealOutlineProvider extends RevealOutlineAnimation {
 
     @Override
     public boolean shouldRemoveElevationDuringAnimation() {
-        return true;
+        return false;
     }
 
     @Override