Merge "Toggle taskbar button nav assistant availability" into tm-qpr-dev am: daffdfa35c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20858639

Change-Id: Id32dcee4a58b87a578c0f08cf6974f0512ba0b1a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>