Bubble API: post update when bubble notification suppression flag changes

When bubbles are expanded or if the user dismisses the notification, the
notification associated with the bubble is suppressed from the shade, but
still technically active / in active notification list because of the
bubble.

We already have a concept of this with isNotificationSuppressed on
BubbleMetadata, this just ensures that the flag is properly updated when
the state changes in System UI. This allows other things showing
notifications (e.g. long press on launcher app icon -> see notifs) to
hide or show notifications consistently with the rest of system ui.

I'm re-using the flag that apps may set to suppress notifications when
they send a bubble that is foreground, since its the same concept.

When this flag state changes a new update is sent with the flag
adjusted.

Added a notification delegate method to communicate the suppression changes
back to NoMan. This is piped through a listener set on Bubble objects.

Test: atest NotificationManagerTest NotificationTest NotificationManagerServiceTest
Bug: 131926652
Bug: 144352570
Change-Id: I25e86849858cdfe2fb81ab51b1ff09980bf70944