Merge "Move media provider related hidden API flag file entries to packages/providers/MediaProvider" into sc-dev am: 35f226f7 am: 6b089588

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15132970

Change-Id: I7a4a3205ce912d289b331ac2a61672f8189f07cd