Handling of Fixed Dialing v3

The goal of these patches is to check, if Fixed Dialing is enabled in SIM-card. Because also invalidation/rehabilitation status of ADN has to be checked, functionality is added for retrieving file-status of EF-files. So general information of EF-files is returned (containing now also file status) without starting the actual EF-content retrieving. The FDN-enable status is checked. If FDN is enabled, SIM-initialisation routine is interrupted (modem is left in PRE-SIM state), and FD-enabled property is signalled over D-BUS. oFono still trusts to EFphase value when selecting SIM/USIM access.