altoslib,altosuilib,altosui: log_format/device_type TeleGPS selects stateless

When the device being analyzed has no flight state, we want to use the
'stateless' state so that the UI can display reasonable
information. This bit was lost in the recent AltosState shuffle and
this patch brings it back.

Signed-off-by: Keith Packard <keithp@keithp.com>