Merge "Use intra wallaper transition animation for move to front/back...

Merge "Use intra wallaper transition animation for move to front/back transition." into sc-dev am: 398b9a81 am: e54799d1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15302105

Change-Id: I0d4551d61888b7eed8e72e24546af0d1ba25c1f2