Disable notification settings access from work apps.

Fixes: 79241388
Test: the following command does not open the notification settings in
work profile user:
$ adb shell am start --user $USER -W -a android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS
Moreover, triggering the notifications from a sample app results in the
new toast being displayed.

Change-Id: I0a330a9cf22c813aea7600557660868263817e1e