fsogsmd: modem_samsung: only provide provider and network display name when value is not null
fsogsmd: modem_samsung: only provide provider and network display name when value is not null

This fixes a problem with SHR as phonefsod requests a network status update already when
SIM card is not in active state. This lets fsogsmd segfault causes it tries to add a null
value to the hash map.

Signed-off-by: Simon Busch <e923d8431f09840b119134ca71ec8d74989d15cc@gravedo.de>

slyon/debian-fso-deviced,slyon/debian-fso-usaged,slyon/debian-fso-deviced,slyon/debian-fso-usaged