[1/3] Telephony: Forward port National data roaming and make it optional

  by Robin Morawetz (Rdlgrmpf) and Davor Bertovic (LorD ClockaN)
  Id: Ief840d818ecf4b8ebb088fab34f01878d0a9f2d7

Change-Id: Ic104cc6a552caff93415d40367bd849c9bfb982d