[automerger skipped] Fix more kotlin nullable errors in Launcher3 am:...

[automerger skipped] Fix more kotlin nullable errors in Launcher3 am: 5a7cfbda -s ours am: db2121af -s ours am: 7936afd0 -s ours

am skip reason: Merged-In I158db4f57d46606d7152a438d68e2b9f4c0014d9 with SHA-1 4aef83aa is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24694222



Change-Id: If62b9259d1a46ef4a7608cae07504db6899f339e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>