Add permission check to Intents used by Authenticator Settings.

Setting shares system uid and can be used to bypass different security
checks.
We add proper handling for intents which resolve toexported=true activities with permission filed.
Added nested preferences filtering.

Change-Id: If68343d155364654fa7db55ace3fb3c4db508c7e
Test: manual tests
Bug: 14408627
1 file changed