Merge "Do not allow non-system apps to provide unverified attributions" into tm-dev am: db187c34

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/31450478



Change-Id: Ica67712348a45e32c17c20dc65125fd988a84de7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>