Merge "Verifying success of setting default Launcher in tests" into sc-dev am: ba302e8a6a am: 0c3a3125a5

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

Change-Id: I4b978e3f3eb87271122b9160ebefbd5915abac85