Merge "[Motion] Split-shade expansion: implement over scroll effect [v1]" into...

Merge "[Motion] Split-shade expansion: implement over scroll effect [v1]" into tm-dev am: fa9d138b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17859843



Change-Id: I4e5bbb8b296806db2b7e21c0cc73f4c7c30b6865
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>