Merge "Improve first opaque activity candidate detection" into udc-dev am:...

Merge "Improve first opaque activity candidate detection" into udc-dev am: 3d8f1668 am: d8faa69f am: 0d06dc26

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22885818



Change-Id: Id71c2e17ab15a869789292e4e9c936a8694c2cad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>