overlay: fix config_tether_apndata defined type

Change-Id: Ic622f358b299fca59d3b7dd519382fb01115fadb
diff --git a/overlay/frameworks/base/core/res/res/values-mcc310-mnc260/config.xml b/overlay/frameworks/base/core/res/res/values-mcc310-mnc260/config.xml
index dcbba33..96c74b9 100644
--- a/overlay/frameworks/base/core/res/res/values-mcc310-mnc260/config.xml
+++ b/overlay/frameworks/base/core/res/res/values-mcc310-mnc260/config.xml
@@ -35,6 +35,8 @@
          TETHER_DUN_APN.  Value is a comma separated series of strings:
          "name,apn,proxy,port,username,password,server,mmsc,mmsproxy,mmsport,mcc,mnc,auth,type"
          note that empty fields can be ommitted: "name,apn,,,,,,,,,310,260,,DUN" -->
-    <string translatable="false" name="config_tether_apndata">T-Mobile Tethering,pcweb.tmobile.com,,,,,,,,,310,260,,DUN</string>
+    <string-array translatable="false" name="config_tether_apndata">
+        <item>T-Mobile Tethering,pcweb.tmobile.com,,,,,,,,,310,260,,DUN</item>
+    </string-array>
 
 </resources>