No icon for `audio-handsfree`
Pulseaudio uses this icon when e.g. pairing your phone to a car via bluetooth.
See https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/commit/28069ef0f74089ae18cefbe7e97d2b920d7ba0cc . The exact icon there is
audio-handsfree-bluetooth but g-c-c and phosh look it up via
g_themed_icon_new_with_default_fallbacks so not having a separate BT variant would likely be fine.
@snwh I think having a separate, easy to identify icon to distinguish easily from headset / headphone / speaker would make sense also having it in adwaita-icon-theme so g-c-c, phosh, gnome-shell, etc. have consistent icons.