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: d2e178f7 am: ac7e7903

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

Change-Id: Idac04dd7655ec16c3211f7606db440c33d76ae8e