Enable sim support in ivi

capi-telephony-sim package will talk to Samsung telephony stack which we don't
have in IVI. Currently, it uses ofono as the telephony stack. So, in client, we
have to use g_dbus* API to get corresponding sim attribute.

BUG=XWALK-2039
```
state_ = (g_variant_get_boolean(var_val) == TRUE) ?
         SYSTEM_INFO_SIM_UNKNOWN : SYSTEM_INFO_SIM_ABSENT;
```