Move batch size to a resource.

This way we can figure out how many apps to send to the grid
at a time even if the grid hasn't been instantiated yet.

Bug: 2599979
Change-Id: I7960fe1adae6976555334422335f3a4b28d0675e

src/com/android/launcher2/AllAppsView.java

@@ -41,8 +41,6 @@ public interface AllAppsView {
 
     public void updateApps(ArrayList<ApplicationInfo> list);
     
-    public int  getAppBatchSize();
-
     public void dumpState();
 
     public void surrender();