Merge "Revert "Merge "Restore V2+ signature requirement for system apps" into tm-dev am: a347b6c2 am: 8aa6d201"" into tm-qpr-dev am: 22e38062 am: 7e3ab73b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18128504



Change-Id: I113a45c116828954851b1c7353a564ac87500282
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>