tree bcdb6f9d91c211fef13a51b3984d4bded81b3fe8
parent ab1ad60ec8615b6d1d5a2950a25c738848635495
author Gus Prevas <kprevas@google.com> 1545329505 -0500
committer Gus Prevas <kprevas@google.com> 1545920690 -0500

Combines NotificationEntryManager listener interfaces (part 2).

This change introduces the NotificationAlertingManager component, a
NotificationEntryListener which handles showing/hiding/updating alerts
(heads-up or ambient pulsing) in response to events from the
NotificationEntryManager.  All code in the new component was moved out
of NotificationEntryManager proper.

Test: atest SystemUITests, manual
Change-Id: I46a046da6caf39b1d314b357e21ac6b4755c5796