QS: Add 8dp above and below the tile panel.

Change-Id: I5ca21cb46e87b8c3707216d0aad90131560d9a2e

Author: John Spurlock

packages/SystemUI/res/layout/qs_panel.xml

@@ -19,6 +19,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/qs_background_primary"
+        android:paddingTop="8dp"
+        android:paddingBottom="8dp"
         android:elevation="2dp">
 
     <com.android.systemui.qs.QSPanel