Merge "Prevent app check via content provider." into sc-dev am: 10239a0c am: 60bafc47 am: 7d964bcb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15018027

Change-Id: I813fce0aa5d91634c2686ec421e49ac47a3ed953