Merge "Remove LauncherState.TASKBAR visible element" into sc-v2-dev am: 779879ce3d am: 562ca940e2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16405551

Change-Id: Ic703ea1b35ff2e0b8b5e1ea1a316251184fbec42