Merge "Start unfold Shell transition from WM side only when unfolding" into...

Merge "Start unfold Shell transition from WM side only when unfolding" into udc-dev am: 25812122 am: b1da43e2 am: 9f5ac394 am: 6c25d5ec

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22970018



Change-Id: I46c83f44ec5537393a4d51f10f4b1990762ae7aa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>