[SystemInfo] add system_info_cellular_network_ivi.cc to fit ivi system

Follow  system_info_sim_ivi.cc(#369), add system_info_cellular_network_ivi.cc to fit ivi system. Also fix the lac and cellId attribute error value.

BUG=XWALK-2362
They are not totally same. 
system_info_cellular_network_mobile.cc, system_info::SetPicoJsonObjectValue(data, "ipv6Address", picojson::value("NOT SUPPORTTED"));
 system_info_cellular_network_ivi.cc, system_info::SetPicoJsonObjectValue(data, "ipv6Address", picojson::value(ipv6Address_));