Hide some previously exempt notifications

Some notifications are exempt from DND visual suppression,
like foreground services. If a notification is tagged as a
category that's explicitly mentioned in DND settings (like calls),
exempt that notification from DND exemption, or, hide it.

Test: atest SystemUITests
Change-Id: I661e6d99d09adcb381aef04cccdf93c9810d19b2
Fixes: 78908945