Removing fade animation on swipe up

Fade animation is no longer required as the transform is also handled on
the main thread. So we will get the RecentsAnimaiton always after Launcher
has drawn

Change-Id: Ieb05406c9a5b9132b0518155bdbda16c1f73a6ec

quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityControllerHelper.java

@@ -181,11 +181,6 @@ public final class FallbackActivityControllerHelper implements
         return false;
     }
 
-    @Override
-    public AlphaProperty getAlphaProperty(RecentsActivity activity) {
-        return activity.getDragLayer().getAlphaProperty(0);
-    }
-
     @Override
     public int getContainerType() {
         return LauncherLogProto.ContainerType.SIDELOADED_LAUNCHER;