Merge "Verifying success of setting default Launcher in tests" into sc-dev am: ba302e8a6a am: ee33c8263f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15158349

Change-Id: I9dd001a750f975f11ceab7c67cf24f4065e44f14