Add wallpaper zoom to areas that have blur

Whenever blurring, the wallpaper should also zoom out. This is the
mental model of our Depth System.

Test: manual
Bug: 149792636
Change-Id: I1783eb87fefeb6f917f0ba64f2c6ec8f1f2004fa

quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java

@@ -244,7 +244,7 @@ public abstract class BaseQuickstepLauncher extends Launcher
         return new StateHandler[] {
                 getAllAppsController(),
                 getWorkspace(),
-                getBackgroundBlurController(),
+                getDepthController(),
                 new RecentsViewStateController(this),
                 new BackButtonAlphaHandler(this)};
     }