Revert "Split mediaprovider from priv_app."

This reverts commit c147b592b88ae1e7268be64d5e3234c1829e0581.

The new domain changed neverallows, breaking CTS compatability.
Revert the domain now, with the intention to re-add for the next
release.

Bug: 62102757
Test: domain is set to priv_app
Change-Id: I907ff7c513cd642a306e3eaed3937352ced90005
6 files changed