Updating the ui for widget restore flow

> Pending widget show a PreloadIconDrawable to indicate
installation progress
> Only the concerned widgets are reinflated on package
install and not the whole workspace.
> Adding support for storing default package icon in
IconCache

issue: 10779035
issue: 16737660

Change-Id: Id787ae4a5ef72d6e01aeb5a1bae5ab8840037679
diff --git a/res/values/config.xml b/res/values/config.xml
index a16f265..750a6aa 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -17,6 +17,10 @@
     <!-- Max number of page indicators to show -->
     <integer name="config_maxNumberOfPageIndicatorsToShow">21</integer>
 
+    <!-- App data backup and restore. To enble backup, register with an android backup service.
+         http://developer.android.com/guide/topics/data/backup.html#BackupKey -->
+    <bool name="enable_backup">false</bool>
+
 <!-- DragController -->
     <integer name="config_flingToDeleteMinVelocity">-1500</integer>