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Registration of a RemoteController may succeed only if:
- the caller has the MEDIA_CONTENT_CONTROL permission,
- or if the RemoteController.OnClientUpdateListener it
registers if one of the enabled notification listeners.
For using the "enabled notification listener" functionality,
the CL involved:
- making OnClientUpdateListener an interface so a 3rd-party
application may have its implementation extend
NotificationListenerService, which is required for a
listener to be enabled by the user.
- add the concept of "enabled" status in an
IRemoteControlDisplay, so a RemoteController (which
encapsulates the IRemoteControlDisplay implementation)
may be registered, but later temporarily disabled by
the user, as a result of a user action in the security
settings, or a user switch.
- making MediaFocusControl, the component tied to
AudioService, monitor changes in enabled notification
listeners, and act upon enable/disable changes.
Bug 8209392
Change-Id: Ia8dfa2156c65668b2b0d4ae92048005912652d84
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