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: If7babb546a4d4a558d4974466a0151ae3bd3c697
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>