Add dun APN for Telstra to apns-full-conf.xml

Test: manual
Bug: 63564491
Change-Id: Iac4680b30a90d718a9b6c76ee0097e111bdd3001
(cherry picked from commit 8d6406911deaa05d8094cc40b54fa67f6125e4e8)
diff --git a/etc/apns-full-conf.xml b/etc/apns-full-conf.xml
index 87ddc78..2e76f5b 100644
--- a/etc/apns-full-conf.xml
+++ b/etc/apns-full-conf.xml
@@ -26426,6 +26426,13 @@
       mmsport="80"
   />
 
+    <apn carrier="Telstra Tethering"
+        mcc="505"
+        mnc="01"
+        apn="telstra.internet"
+        type="dun"
+    />
+
   <apn carrier="Optus Yes Internet"
       mcc="505"
       mnc="02"