Merge "Round bottom corners for notif before shelf after swipe ends" into...

Merge "Round bottom corners for notif before shelf after swipe ends" into sc-dev am: ece342ba am: d2f20161 am: 27504265

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15181380

Change-Id: Ib1205e3576059a03457e09e51b7a78d2908d5c76