Dynamically determine # of rows/cols in All Apps.

Change-Id: Ia8c1b3915325823f7617862e0e4e0db865ea0d5d

src/com/android/launcher2/PagedViewCellLayout.java

@@ -79,6 +79,14 @@ public class PagedViewCellLayout extends ViewGroup implements Page {
         addView(mHolographicChildren);
     }
 
+    public int getCellWidth() {
+        return mCellWidth;
+    }
+
+    public int getCellHeight() {
+        return mCellHeight;
+    }
+
     public void allowHardwareLayerCreation() {
         // This is called after the first time we launch into All Apps. Before that point,
         // there's no need for hardware layers here since there's a hardware layer set on the