alsa: Implement full-duplex support.
alsa: Implement full-duplex support.

This adds capture and full-duplex streams, and basic (reporting only the
default input and output device) device enumeration and selection.

padenot/cubeb,kinetiknz/cubeb,kinetiknz/cubeb,padenot/cubeb,kinetiknz/cubeb,padenot/cubeb