Make sure QS tile layouts don't have overlapping rendering

Bug: 27361901
Change-Id: I177bbf8c0d13b0e9595d9b95c87eb01df1bc7d05

packages/SystemUI/src/com/android/systemui/qs/PagedTileLayout.java

@@ -59,6 +59,11 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
         setCurrentItem(0);
     }
 
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();

packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java

@@ -183,5 +183,10 @@ public class QuickQSPanel extends QSPanel {
             // No resources here.
             return false;
         }
+
+        @Override
+        public boolean hasOverlappingRendering() {
+            return false;
+        }
     }
 }