Add a knob to change the impact of the notification-seen event.

Currently, notification-seen event will promote an app to
Working set bucket. This change adds a knob to allow changing
the bucket that the app gets promoted to on a notification-seen
event.

This change also updates AppStandbyController logic to allow
setting timeouts for buckets other than Active and Working set.

Bug: 206518483
Test: atest --test-mapping apex/jobscheduler/service/java/com/android/server/usage/TEST_MAPPING
Change-Id: Ic818c3871a34107b86b97c983285214beea220a5