[automerger skipped] Merge "Remove legacy activity starter code" into udc-dev...

[automerger skipped] Merge "Remove legacy activity starter code" into udc-dev am: 2222c55f am: a50e4699 -s ours

am skip reason: Merged-In I73af77466f4a199dd743e62e48f7040c36e8cd8f with SHA-1 1afe9b29 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22976334



Change-Id: I5b55eb29bd118d0db2052f483aec35eec37839d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>