Call through to super.removeallViews*().

Fixes the duplicate view bug by actually removing the views.

Bug: 3165740
Change-Id: I18f26e4cf498e6d53825959a61d585fac2c89faa

src/com/android/launcher2/CellLayout.java

@@ -646,11 +646,13 @@ public class CellLayout extends ViewGroup implements Dimmable {
 
     @Override
     public void removeAllViews() {
+        super.removeAllViews();
         clearOccupiedCells();
     }
 
     @Override
     public void removeAllViewsInLayout() {
+        super.removeAllViewsInLayout();
         clearOccupiedCells();
     }