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/AllApps2D.java

@@ -50,8 +50,6 @@ public class AllApps2D
 
     private static final String TAG = "Launcher.AllApps2D";
 
-    private static final int BATCH_SIZE = 6; // give us a few apps at a time
-
     private Launcher mLauncher;
     private DragController mDragController;
 
@@ -302,10 +300,6 @@ public class AllApps2D
         return -1;
     }
 
-    public int getAppBatchSize() {
-        return BATCH_SIZE;
-    }
-
     public void dumpState() {
         ApplicationInfo.dumpApplicationInfoList(TAG, "mAllAppsList", mAllAppsList);
     }