update apn setting name for AT&T

Bug: 17897659
Change-Id: Ifadd6ab8168bea6f3868d92f89dccee44d259458
diff --git a/etc/apns-full-conf.xml b/etc/apns-full-conf.xml
index 99dcfab..e1ebdeb 100755
--- a/etc/apns-full-conf.xml
+++ b/etc/apns-full-conf.xml
@@ -9739,7 +9739,7 @@
       type="mms"
   />
 
-  <apn carrier="ATT Phone"
+  <apn carrier="ATT Nextgenphone"
       mcc="310"
       mnc="410"
       apn="nxtgenphone"