Merge "First pass at Taskbar layout UI polish for SUW" into tm-qpr-dev am: 5c4b6b50d7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20086056

Change-Id: I785f86e0daa82618a03c1633ea0efc710e482139
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>