Use app ops to trigger app block change notifications

When app level block state is represented as a permission,
it will sync to app ops as NMS does today.

Test: atest NMSTest and NPMTest, CTS Verifier with
migration flag on and off
Bug: 194833441
Change-Id: Ic53ed8e15b04d1065c40899c8f5d441a03547bbf

Change-Id: I43a8ec9cde2383cd1b501f124ebe348fddea2e9f