WidgetTray revamp work
- RecyclerView is rendering
- Animation is connected
- Drag and drop is now handled
- UI tweaking: background, margins, more to come.
- Flicker and preview not loading issue:
  fixed height for the horizontal scroll view.
- Shortcuts are added
- Widget Preview loading should support shortPress for drop
- UI tweaks left: overlay of arrow when there are more items to scroll
- icons are added in the section header
- Sorting of widget sections and widget horizontal list
- Adding all the padding constants to dimen.xml file
- RecyclerView should only support one view type

For items to be addressed in follow up patches OR CLs,
TODO is added to the comment.

b/19897708

Change-Id: Ibfc4da1696a23d20bada93db46e126706eb13cdc
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 1f36331..98ba09b 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -3628,7 +3628,7 @@
         private final HashMap<Object, String> mLabelCache;
         private final Collator mCollator;
 
-        WidgetAndShortcutNameComparator(Context context) {
+        public WidgetAndShortcutNameComparator(Context context) {
             mManager = AppWidgetManagerCompat.getInstance(context);
             mPackageManager = context.getPackageManager();
             mLabelCache = new HashMap<Object, String>();