Merge "Address a couple small followups for TaskbarInsetsController" into tm-dev am: 357c622572 am: 9de10ff889 am: 83929ce543

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

Change-Id: I986033b5c2759c94b1feca669c91c8f8aace4e86
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>