A Sonos speaker implements none of the access-point surface — no SSIDs, no radio
configuration, no MAC ACL. It has get_playback_state, get_volume, play and
get_zone_info. It inherited AccessPointDriver because nothing better existed,
and netOrk reads that role to decide what belongs in its wireless page and its
AP profile pickers, so a speaker showed up in both.
napalm-device-types now has MediaDriver, which is what this is. TYPE_LABEL
becomes "Media" rather than "Access Point".
Same root cause as netork#117.