Allow interrupting notifications to bypass lifetime extension

Notifications which have interruped the UI (usually a HUN) can safely
bypass FGS lifetime extension because the system has done the best it
can to show the user this notification.

This valve is important in particular for things like a dialer which
might want to interrupt a user but need to do so again on the same
channel, for instance when getting multiple phone calls quickly in
succession.

Bug: 155594347
Test: atest ForegroundServiceNotificationListenerTest
Change-Id: Id80fba3191cc133d1e73ca04015f9cbed62fc086