Make FolderIcon.getFolder() public and add Folder.getContent().

Change-Id: I21ad8b8178acbde2759cd2dfcd015d91e00b7505
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index b4c3992..fb226e5 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -303,6 +303,10 @@
         return mFolderName;
     }
 
+    public CellLayout getContent() {
+        return mContent;
+    }
+
     /**
      * We need to handle touch events to prevent them from falling through to the workspace below.
      */