Merge "Merge "Put activity-start into its own transition when recents collecting" into udc-dev am: 70941199 am: 962b2744" into udc-d1-dev-plus-aosp am: 2a5713d2

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



Change-Id: Ie3069dcb6921b11674058bae0edecdf0969a52d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>