apn: Add Mint Mobile

* https://www.mintmobile.com/help/how-to-configure-android-settings/

Change-Id: I25933b164f85020a726a09774c4b06788fa765f8
diff --git a/prebuilt/common/etc/apns-conf.xml b/prebuilt/common/etc/apns-conf.xml
index d7477b8..a5100a0 100644
--- a/prebuilt/common/etc/apns-conf.xml
+++ b/prebuilt/common/etc/apns-conf.xml
@@ -1334,6 +1334,7 @@
   <apn carrier="WCW-MMS" mcc="310" mnc="180" apn="mms.wcc.net" proxy="209.55.70.246" port="80" mmsc="http://mms.wcc.net" mmsproxy="209.55.70.246" mmsport="80" user="13257630000" password="mmsc" type="mms" authtype="3" />
   <apn carrier="WCW-MMS only" mcc="310" mnc="180" apn="mms.wcc.net" proxy="209.55.70.244" port="80" mmsc="http://mms.wcc.net" mmsproxy="209.55.70.246" mmsport="80" user="3257630000" password="mmsc" type="default,mms" authtype="3" />
   <apn carrier="Ting Data" mcc="310" mnc="240" apn="wireless.dish.com" mmsc="http://wholesale.mmsmvno.com/mms/wapenc" protocol="IPV4V6" roaming_protocol="IPV4V6" type="default,admin,fota,mms,supl,hipri,internet,dun" />
+  <apn carrier="Mint" mcc="310" mnc="240" apn="Wholesale" type="default,supl,mms,ia" mmsc="http://wholesale.mmsmvno.com/mms/wapenc" mmsport="8080" protocol="IPV4V6" roaming_protocol="IPV4V6" mvno_type="gid" mvno_match_data="756D" />
   <apn carrier="T-Mobile US IMS" carrier_id="1" mcc="310" mnc="260" apn="ims" type="ims" protocol="IPV6" bearer_bitmask="14|20" mtu="1440" user_visible="false" />
   <apn carrier="T-Mobile US IMS" carrier_id="1" mcc="310" mnc="260" apn="ims" type="ims" protocol="IPV6" roaming_protocol="IPV6" bearer_bitmask="18" mtu="1440" user_visible="false" />
   <apn carrier="T-Mobile MMS" carrier_id="1" mcc="310" mnc="260" apn="TMUS" mmsc="http://mms.msg.eng.t-mobile.com/mms/wapenc" type="mms,xcap" protocol="IPV6" roaming_protocol="IPV6" bearer_bitmask="18" />