Merge "Enable transient taskbar flag on by default." into tm-qpr-dev am: 229d9bc3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20654700



Change-Id: I3ba873365643e48488cdedae5947170d4a4cc34e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>