rilmodem: setprop "gsm.sim.operator.iso-country"

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
rilmodem: setprop "gsm.network.type"

Android defines all names for valid radio technologies in
android.telephony.ServiceState.rilRadioTechnologyToString(). Just
follow it.

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
rilmodem: setprop "gsm.operator.{alpha,numeric,iso-country,isroaming}"

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>