apns: Adjust MetroPCS apn to allow USB tether

Change-Id: I41f0c7688dc38eb334fabb845f026c37fbb92655
diff --git a/prebuilt/common/etc/apns-conf.xml b/prebuilt/common/etc/apns-conf.xml
index 6cd9dcc..186866b 100644
--- a/prebuilt/common/etc/apns-conf.xml
+++ b/prebuilt/common/etc/apns-conf.xml
@@ -1387,7 +1387,7 @@
   <apn carrier="Project Fi - T" mcc="310" mnc="260" apn="h2g2" user="none" server="*" password="none" mmsc="http://mmsc1.g-mms.com/mms/wapenc" protocol="IPV6" roaming_protocol="IP" mvno_match_data="31026097" mvno_type="IMSI" />
   <apn carrier="T-Mobile IMS" mcc="310" mnc="260" apn="ims" type="ims" modem_cognitive="true" protocol="IPV6" />
   <apn carrier="MetroPCS 260" mcc="310" mnc="260" apn="fast.metropcs.com" protocol="IPV4V6" roaming_protocol="IPV4V6" mvno_match_data="6D" mvno_type="gid" type="ia" mtu="1440" />
-  <apn carrier="MetroPCS 260" mcc="310" mnc="260" apn="fast.metropcs.com" mmsc="http://metropcs.mmsmvno.com/mms/wapenc" protocol="IPV6" roaming_protocol="IP" mvno_match_data="6D" mvno_type="gid" type="default,supl,mms" mtu="1440" />
+  <apn carrier="MetroPCS 260" mcc="310" mnc="260" apn="fast.metropcs.com" mmsc="http://metropcs.mmsmvno.com/mms/wapenc" protocol="IPV6" roaming_protocol="IP" mvno_match_data="6D" mvno_type="gid" type="default,supl,mms,dun" mtu="1440" />
   <apn carrier="MetroPCS 260 IMS" mcc="310" mnc="260" apn="ims" type="ims" mvno_match_data="6D" mvno_type="gid" protocol="IPV6" roaming_protocol="IPV6" mtu="1440" />
   <apn carrier="Net10" mcc="310" mnc="260" apn="wap.tracfone" port="8080" mmsc="http://mms.tracfone.com" type="default,mms,supl" />
   <apn carrier="Family Mobile" mcc="310" mnc="260" apn="web.omwtoday.com" port="" mmsc="http://wirelessfour.mmsmvno.com/mms/wapenc" mvno_type="gid" mvno_match_data="4d4b" type="default,mms,supl" />