Improve launcher loading performance by only doing re-binds.

This always reloads the workspace, because I think it's a less risky change and that only adds
~100ms.

Change-Id: I215b1f741f022e47ce06e78b9cfdd9967a8f1b9d

src/com/android/launcher2/LauncherApplication.java

@@ -73,8 +73,6 @@ public class LauncherApplication extends Application {
     private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
         @Override
         public void onChange(boolean selfChange) {
-            // TODO: lockAllApps();
-            mModel.setWorkspaceDirty();
             mModel.startLoader(LauncherApplication.this, false);
         }
     };