Telephony: Update WiFi country code

Upon use of foreign SIM card, WiFi country
code should be the MCC of the registered network.
Currently, country code of the registered operator
is not updated.

This patch updates the WiFi country code with
the country code received as part of the
registration messages.

Change-Id: I789636e87417d97896bee2eba01dcec14840ff43
Author: Jeevaka Badrappan <jeevaka.badrappan@intel.com>
Signed-off-by: Jeevaka Badrappan <jeevaka.badrappan@intel.com>
Signed-off-by: Arun Ravindran <arun.ravindran@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 57324