Update TMO MMS APN

Replace the default TMO MMS APN (fast) with new APN (tmus). TMUS is
specified for IWLAN but can actually be used for both IWLAN and LTE.

Change-Id: Ic694d24083d551404bd6459b31c0342e61135996
diff --git a/etc/apns-full-conf.xml b/etc/apns-full-conf.xml
index a78ea97..c038cf1 100755
--- a/etc/apns-full-conf.xml
+++ b/etc/apns-full-conf.xml
@@ -9313,13 +9313,22 @@
       mcc="310"
       mnc="260"
       apn="fast.t-mobile.com"
-      mmsc="http://mms.msg.eng.t-mobile.com/mms/wapenc"
-      type="default,supl,mms"
+      type="default,supl"
       protocol="IPV6"
       roaming_protocol="IP"
       mtu="1440"
   />
 
+  <apn carrier="T-Mobile MMS"
+      mcc="310"
+      mnc="260"
+      apn="TMUS"
+      mmsc="http://mms.msg.eng.t-mobile.com/mms/wapenc"
+      type="mms"
+      protocol="IPV6"
+      roaming_protocol="IP"
+  />
+
   <apn carrier="MetroPCS"
       mcc="310"
       mnc="260"