Merge "[Unfold transition] Update latency tracker to listen for animation...

Merge "[Unfold transition] Update latency tracker to listen for animation start" into tm-qpr-dev am: 596e3f90

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20637217



Change-Id: Ie5445ece5ea5d0c19d7f0e37306a6f8cb297ad99
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>