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

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



Change-Id: I66288236aca97931544c19f653b086fffbc9d5c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>