Merge "Migrate unfold animation to Shell transitions [Part 1]" into tm-dev am: a830367d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17071467



Change-Id: I457b4692e45d73b756669b490642902b5d5a65ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>