Handling of Fixed Dialing

First patch checks if Fixed Dialing is enabled in the SIM-card by reading FD-activated bit from EFsst or EFest. If FDN is enabled, SIM initialization procedure is stopped, and modem will stay in the PRE-SIM state. If FD is enabled, this is signaled via DBUS. I haven't been abled to test this in my 2G-modem properly. Response for EF-phase is 3. So oFono-API starts to access EFust/EFest files. But reading of EFest gives next error: 'technical problem with no diagnostic given'. So FD-status is no reachable, although I have activated it in the SIM-card. I also checked if the FD-status could be located in EFsst (well, accessed with same code as with EFust), but I couldn't give any change for allocated/activated bits for FDN, even though I enabled/disabled FDN. Please comment/test.