Merge "Skip marking recents as pending top if it is already on top" into sc-dev am: 0c94b529 am: 4d1c3086

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15259271

Change-Id: Iefdda776d4d1164fe0986ae578e434798449ba6f