Merge "Fix more kotlin nullable errors in Launcher3" into udc-dev-plus-aosp am: 1a0b25c3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24593180



Change-Id: I11a4409c09ae3b2a03fdfde2de906123fd39f8b1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>