agent: Add "keyboard" input capability when pairing
This better reflects the input capabilities a typical GNOME desktop has.
See the IO capabilities table in https://www.bluetooth.com/blog/bluetooth-pairing-part-1-pairing-feature-exchange/
This better reflects the input capabilities a typical GNOME desktop has.
See the IO capabilities table in https://www.bluetooth.com/blog/bluetooth-pairing-part-1-pairing-feature-exchange/