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

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



Change-Id: Id98f99f553dd861301ac5207a16a1440287e4394
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>