SystemUI: Only add GarbageMonitor tile to default tiles on ENG builds

Change-Id: Ice1bab5f3d1b3a15f20085cfb7f5578c7f70855a

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

@@ -540,7 +540,7 @@ public class QSTileHost implements QSHost, Tunable, PluginListener<QSFactory>, D
         final String defaultTileList = res.getString(R.string.quick_settings_tiles_default);
 
         tiles.addAll(Arrays.asList(defaultTileList.split(",")));
-        if (Build.IS_DEBUGGABLE
+        if (Build.IS_ENG
                 && GarbageMonitor.ADD_MEMORY_TILE_TO_DEFAULT_ON_DEBUGGABLE_BUILDS) {
             tiles.add(GarbageMonitor.MemoryTile.TILE_SPEC);
         }