App can read installed sync content providers without requiring
any permission via the api ContentResolver#requestSync and
ContentResolver#addStatusChangeListener.
This cl enforces package visibility filter to the api
ContentResolver#addStatusChangeListener. Application without the
package visibility tag of the target applications in its manifest
cannot receive sync status callbacks of the target applications.
Bug: 190726121
Test: atest AppEnumerationTests
Test: atest CtsSyncManagerTestsCases
Test: atest ContentResolverSyncTestCaseatest
Test: atest SyncManagerTest
Test atest SyncOperationTest
Test: atest SyncStorageEngineTest
Test: atest DeferSyncTest
Change-Id: I58d0baf5baefd942b454f06e1fa9d3b34d532a77
650cb7a9da