Merge "Showing action buttons in collapsed QS in split shade" into sc-v2-dev am: bdf4297921 am: 3d4a61fb0c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15482450

Change-Id: Iae57baa7a548e4b8e5bab3680ee9918f7879556e