Merge "Stash/unstash the task bar based on states" into sc-v2-dev am: 2ccfa02fde am: 2d0ac589fb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15751127

Change-Id: If6b7d39ed2540b00aed606bc2ffb405608124dbb