Merge "Destroy the last embedded activity immediately" into tm-dev am: 5f99fcc0 am: 7efeba7d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18231723



Change-Id: I806b0c686754e0555c2e318df48d765ccddc9551
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>