Stabilize mapping between ringer-mode=silent and zen=priority
by keeping track of two ringer modes:
- Internal ringer mode: Used for underlying stream muting
- External ringer mode: Reported to clients
The mapping between external ringer mode + zen is:
- normal = all
- vibrate = all
- silent = priority (read-write) or none (read)
Changes include:
- Remove "zen check" from audio service, back to audio
service having no knowledge of zen.
- Maintain a new external ringer mode in audio service,
this is the ringer mode reported through AudioManager
to callers, also mapped to the change intent.
- Introduce a "ringer mode delegate" to the local
audio manager interface, responsible for observing
external / internal mode changes, and making changes
if necessary.
- Internal ringer mode changes are still interesting
to the volume dialog, wire up a callback through
the existing IVolumeController interface.
- On devices without vibration, the mapping is the same
but since no ringer mode change is possible, disable
the icon toggle and remove the mute icon when volume=0.
- On devices with vibration, volume down presses should
pulse the vibrate icon (and vibrate) as a hint that this
is as low as the device can go using the keys. Since
the mechanics are similar to the existing zen=none hint,
pull into shared helper.
- Log ringer mode changes to the zen log, include calling
package information for issue diagnosis.
- Include whether vibration is supported in the audio service
dump.
- Update the status bar icon policy to use the internal ringer
mode, not the external mode (for vibrate icon).
- Update the "Muted by <x>" logic, include current suppressor
in dumpsys, ensure suppression icon is enabled & !clickable,
regardless of zen mode.
Bug: 17884168
Bug: 15471679
Bug: 16824970
Change-Id: Ia7d3bb23ce6d1e37b24fb6521d1c1ab9bb8f60c0
661f2cf458