[Activity embedding] Fix unexpected finished 2nd layer problem am: 9e207bfc

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/20309891



Change-Id: I0ed23ce19ce4dca5308ecae20e891f4476738258
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>