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

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



Change-Id: I8709777133a1d2578520d41e3c70d7e493334c95
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>