Notification instance ids in NMS for statsd logs.

Notification instance IDs are generated by NotificationManagerService
when the notification is first posted, and stored in the
StatusBarNotification so that they can be passed to the SystemUI
process.

Bug: 144022566
Test: atest NotificationManagerService BuzzBeepBlinkTest RoleObserverTest
Test: statsd_testdrive 244
Change-Id: I804786dfa165864257d8801d7e96f2ac0ead960f
11 files changed