Add Notification channels
In this iteration:
-Every app gets a default channel that notifications will be posted
to if they don't specify a channel themselves. The default channel
inherits app-wide settings on upgrade.
-Apps can create new channels without user approval, but apps
cannot change the name of a channel once created, nor can they ever
set the importance.
- When a notification is posted:
- If the channel is marked as 'vibrates', vibration will be
applied to notifications that lack a vibration. unlike the default
notification flag, notifications will retain their custom vibration
if given
- Same with sound and lights
- A notification's importance is the min of the app and channel
importance
- A notification can bypass dnd if: either the app or channel settings
say it can
- A notification's show on lockscreen setting comes from the app first,
and the channel second if the app has no preference
Tests: in cl. also there's a cl for cts and a test app.
Change-Id: I630f99df655800b00586dcfab538d320d04fe0f0
22 files changed