Log whether notifications are ongoing or foreground services as well as timeout.

This adds a new method to NotificationRecordLogger to detect whether something is a foreground service notification. There's already an existing method in StatusBarNotification to check for ongoing notifications.

Bug: 183020043, 189500414
Test: atest NotificationRecordLoggerTest; statsd_testdrive
Change-Id: I39c700ab844d06a6fb20990c19a27e90440d92c7