APN type fix for Telenor Serbia

APN type was set to "default,supl,mms" for both internet and mms. Using CyanogenMod (CM11) it is causing of sending and receiving mms to get stuck forever.

This sets APN type for internet to "default,supl" and "mms" for mms.

Change-Id: Ia2cede31788ab4f76b52d8a2f2ef8a934427169e