Merge "re-organize recents transition code for future changes" into udc-dev am: ca939575

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21497556



Change-Id: Iea50d4dd91537c5a44b1793851f47c974ee46c46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>