Add Latency logging for Classification adjustments

Records notification lifetime when an adjustment of KEY_TYPE is
received, as well as whether the notification was already posted when
the adjustment occurred, the type received, and whether the notification
would have been alerting when it was adjusted.

Bug: 375462619
Test: atest NotificationManagerServiceTest
Flag: android.service.notification.notification_classification
Change-Id: I5b8ba5edb72caa9b4e1cf4c7dace22a1022f5b87