Cleanup and refactoring in relation to drag and drop

-> folder creation, adding to folders, reordering, switching pages
-> ensuring parity of dragEnter and dragExit in cell layouts and workspace
   (neither were consistently getting an even number of each)
-> actually enforced above with exceptions -- probably want to
   take these out, but maybe we can leave them in as warnings
-> fixed bug with mapping points to hotseat
-> fixes other bugs with drag and drop

Change-Id: I564568f810f2784d122ec6135012b67c2e8e7551
diff --git a/src/com/android/launcher2/FolderIcon.java b/src/com/android/launcher2/FolderIcon.java
index c005edf..513fa6b 100644
--- a/src/com/android/launcher2/FolderIcon.java
+++ b/src/com/android/launcher2/FolderIcon.java
@@ -325,7 +325,10 @@
     }
 
     public void onDragExit(Object dragInfo) {
-        if (!willAcceptItem((ItemInfo) dragInfo)) return;
+        onDragExit();
+    }
+
+    public void onDragExit() {
         mFolderRingAnimator.animateToNaturalState();
     }