[Tizen ] Enable sim support for 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
Same comment as the storage PR.
```
swtich (state) {
  case xxx:
    return "";
  ...
}
```