Merge "Revert "Merge "Restore V2+ signature requirement for system apps" into...

Merge "Revert "Merge "Restore V2+ signature requirement for system apps" into tm-dev am: a347b6c2 am: 8aa6d201"" into tm-d1-dev am: 570156dd am: dd3d3bce am: 7c903ec3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18141981



Change-Id: I17d98297674b5b06f5cedf080336738e348c828b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>