Merge "Address a couple small followups for TaskbarInsetsController" into tm-dev am: 357c622572

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17873349

Change-Id: I6c01f58f282234ce2e85a582a25a442ba7c7d9d2
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>