Merge "Fix transitions in the background when launching something in TaskView" into sc-dev am: 83f4345f am: a1a2de88 am: 7ccef9f7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14551317

Change-Id: Id30bcab152b65352d1734a66346f7699bf288af2