Merge "Update SYSUI_STATE_SCREEN_PINNING in TaskbarDelegate" into sc-v2-dev am: 40e25e5fd1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15805922

Change-Id: Idae550fb1d94afd50452002b87c45f811943b5cb