Merge "Put activity-start into its own transition when recents collecting"...

Merge "Put activity-start into its own transition when recents collecting" into udc-dev am: 70941199 am: 962b2744 am: e80abdf1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22873334



Change-Id: I918a440c8056d844b9cb77ebcb315ad669a1d409
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>