Making some methods accessible

Bug: 63996463
Change-Id: I3cd2e21b8aa6744fc8003a131178ce1671e024dd
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index aac8005..3ebccda 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -780,7 +780,7 @@
         return mCellWidth;
     }
 
-    int getCellHeight() {
+    public int getCellHeight() {
         return mCellHeight;
     }