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: I735a58528fcd157d9e7f63b879a4280a2391dc46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>