Merge "Treat setup wizard default home as null." into tm-qpr-dev am: 5248b020 am: f5dc57a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21690746



Change-Id: Ia74f686795b42ab9f6d860850e7759329864ff96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>