[rilmodem] add missing brace characters

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
[rilmodem] Add Call Barring support

Signed-off-by: Miia Leinonen <miia.leinonen@oss.tieto.com>
[rilmodem] Fix for Call Barring commit

Signed-off-by: Miia Leinonen <miia.leinonen@oss.tieto.com>