Merge "Start edge extension animations in sync" into tm-dev am: 7ecba896 am: 288efbce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18176062



Change-Id: I6d18f76b84493383cda602f97d823aae0501976e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>