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: I6e11da1b99582bf9bbd30e28466329da7c2c9e2e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>