Make sure QS tile layouts don't have overlapping rendering

Bug: 27361901
Change-Id: I177bbf8c0d13b0e9595d9b95c87eb01df1bc7d05
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java b/packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java
index abe4c77..4408dbf 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QuickQSPanel.java
@@ -183,5 +183,10 @@
             // No resources here.
             return false;
         }
+
+        @Override
+        public boolean hasOverlappingRendering() {
+            return false;
+        }
     }
 }