Turning on hardware layers for the workspace

- Obsoletes need for CachedViewGroup and CachedTextView on workspace as well

Bug #3413433
diff --git a/src/com/android/launcher2/CellLayoutChildren.java b/src/com/android/launcher2/CellLayoutChildren.java
index a6f7f42..76a6900 100644
--- a/src/com/android/launcher2/CellLayoutChildren.java
+++ b/src/com/android/launcher2/CellLayoutChildren.java
@@ -44,6 +44,7 @@
     public CellLayoutChildren(Context context) {
         super(context);
         mWallpaperManager = WallpaperManager.getInstance(context);
+        setLayerType(LAYER_TYPE_HARDWARE, null);
     }
 
     public void setCellDimensions(int cellWidth, int cellHeight,