Changes to the system default audio output do not generate "devicechange" events and do not change enumerateDevices() results when [[storedDeviceList]] is not null

[karlt]

Changes to enumerateDevices() results and "devicechange" events are expected when there is more than one audio output device because the order of results should depend on which is the system default.

If device is the system default audio output, prepend deviceInfo to otherDeviceList. Otherwise, append deviceInfo to otherDeviceList.

enumerateDevices() uses [[storedDeviceList]] if not null, and so the device change notification steps should be executed for updated results.