Adding background protection for tab labels in AllApps/Customize and modified padding to match mockups.

Change-Id: I7f3b37d892fdf5a702a66d68e1bbdf333068d7ec
diff --git a/res/layout-xlarge-land/launcher.xml b/res/layout-xlarge-land/launcher.xml
index f93506e..0fc954b 100644
--- a/res/layout-xlarge-land/launcher.xml
+++ b/res/layout-xlarge-land/launcher.xml
@@ -157,7 +157,7 @@
     <TabHost
         android:id="@android:id/tabhost"
         android:layout_width="match_parent"
-        android:layout_height="460dp"
+        android:layout_height="480dp"
         android:layout_gravity="bottom">
         <LinearLayout
             android:orientation="vertical"