apns: NOS: fix tethering and mms.

This fixes BUGBASH-2328 for Portuguese carrier NOS (mcc="268"
  mnc="03").

  This is an ugly workaround since you can't edit the APN definition
  anymore: if you try to save an APN with type dun, you get the error
  message: "Carrier does not allow adding APNs of type dun." But it's
  working.

  Since the preinstalled APNs does not need to be edited and this
  doesn't break anything else for this carrier, this is acceptable.

  Thanx to tfae@xda.

Change-Id: Ic81a9549bf9610805e68b9be56c811b008cbdacb

prebuilt/common/etc/apns-conf.xml

@@ -1131,8 +1131,9 @@
   <apn carrier="Vodafone PT Internet" mcc="268" mnc="01" apn="net2.vodafone.pt" proxy="iproxy.vodafone.pt" port="80" mmsc="http://mms.vodafone.pt/servlets/mms" mmsproxy="iproxy.vodafone.pt" mmsport="80" type="default,supl,mms" />
   <apn carrier="Vodafone PT WAP MMS" mcc="268" mnc="01" apn="vas.vodafone.pt" user="vas" password="vas" mmsc="http://mms/servlets/mms" mmsproxy="213.30.27.63" mmsport="8799" type="mms" />
   <apn carrier="Vodafone PT WAP" mcc="268" mnc="01" apn="wap.vodafone.pt" user="wap" password="wap" proxy="172.16.19.50" port="8799" type="default,supl" />
-  <apn carrier="NOS Internet" mcc="268" mnc="03" apn="umts" type="default,supl" />
-  <apn carrier="NOS MMS" mcc="268" mnc="03" apn="mms" mmsc="http://mmsc:10021/mmsc" mmsproxy="62.169.66.5" mmsport="8799" type="mms" />
+  <apn carrier="NOS/WTF Internet" mcc="268" mnc="03" apn="umts" type="default,supl,dun" />
+  <apn carrier="NOS MMS" mcc="268" mnc="03" apn="mms" mmsc="http://mmsc:10021/mmsc" mmsproxy="62.169.66.5" mmsport="8799" authtype="1" type="mms" />
+  <apn carrier="WTF MMS" mcc="268" mnc="03" apn="umts" mmsc="http://mmsc:10021/mmsc" mmsproxy="62.169.66.5" mmsport="8799" authtype="1" type="mms" />
   <apn carrier="Lycamobile PT" mcc="268" mnc="04" apn="data.lycamobile.pt" user="lmpt" password="plus" type="default,supl"/>
   <apn carrier="Lycamobile" mcc="268" mnc="04" apn="data.lycamobile.pt" proxy="" port="" user="lmpt" password="plus" mmsc="" mvno_type="spn" mvno_match_data="Lycamobile" type="default,supl" />
   <apn carrier="MEO Internet" mcc="268" mnc="06" apn="internet" type="default,supl" />