Merge "Allowing having only SysUI views before pressHome()" into sc-v2-dev am: fcc51bd1fa am: 250509522e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15902027

Change-Id: Id325878f808ae900782a9e022e413190c76c4951