Fix NullPointerException when switching from customization picker(CustomizationPickerActivity) to wallpaper picker(TopLevelPickerActivity).

Should not access any views in CustomizationPickerActivity after switching to TopLevelPickerActivity since the views are null.

Bug: 155355476
Change-Id: Id4f3177215fac8766c5bb33f0337bc7a591ec3fd
1 file changed