Merge "Improve drag divider dismiss transition." into udc-dev am: 41464c2f am: b3bb7114

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23345341



Change-Id: I3017c96b144e0f4a9d537aea470c0a85376655b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>