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: fdc300c7

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



Change-Id: I68c2d02d1d85c9151f1c52ff433a806bb80c2a8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>