Initial changes to break out AllApps into its own view.

- Moves launcher state-transition code into its own class
- Moves all-apps related code into a separate view/set of classes
- Implements a basic list view for all apps

Change-Id: I68f174aa9e1bf82c4e46ce9549c78a8dc4623f46

src/com/android/launcher3/WidgetPreviewLoader.java

@@ -131,8 +131,8 @@ public class WidgetPreviewLoader {
     private final PaintCache mDefaultAppWidgetPreviewPaint = new PaintCache();
     private final BitmapFactoryOptionsCache mCachedBitmapFactoryOptions = new BitmapFactoryOptionsCache();
 
-    private final HashMap<String, WeakReference<Bitmap>> mLoadedPreviews = new HashMap<String, WeakReference<Bitmap>>();
-    private final ArrayList<SoftReference<Bitmap>> mUnusedBitmaps = new ArrayList<SoftReference<Bitmap>>();
+    private final HashMap<String, WeakReference<Bitmap>> mLoadedPreviews = new HashMap<>();
+    private final ArrayList<SoftReference<Bitmap>> mUnusedBitmaps = new ArrayList<>();
 
     private final Context mContext;
     private final int mAppIconSize;