base

A notification that emerges from Zen Mode interception should beep.

If a notificaiton emerges from Zen Mode due to a ranking
reconsideration (possibly because a long-running query resolved an
important person) then it should get the oportunity buzz, beep, blink,
and send accessibility events.

Save what we need to know about the old notificaiton record on the new
record so we don't have to hold onto it.

Bug: 15383458
Change-Id: I15c7834fef03ff6a676e78e9d2caae24f00720ef