Merge "Add multi-task support to recents-animation task-appeared" into sc-v2-dev am: 35b8e2b997 am: c7e8bbf286

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16184046

Change-Id: I739695f78712172bb90836df465e0b76492c99e9