Merge "Track LauncherState for task bar stashing better" into sc-v2-dev am: fc0b21596f am: e268bda30d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15951094

Change-Id: Iabfbc700313c098ad67b0e4664fe098416b9a9e0