Make APNs read-only for certain carriers.

Change is for Canadian carriers - Telus, Bell, Rogers, Fido.
And Vodafone UK.

Bug: 31074581
Bug: 31003310
Change-Id: Ica60905aa0ce3c0c8a635db55c86f31bcc09a9df
diff --git a/assets/carrier_config_302220.xml b/assets/carrier_config_302220.xml
index d247feb..13473c1 100644
--- a/assets/carrier_config_302220.xml
+++ b/assets/carrier_config_302220.xml
@@ -8,5 +8,8 @@
         <int name="maxMessageSize" value="1048576" />
         <int name="maxImageWidth" value="2592" />
         <boolean name="voicemail_notification_persistent_bool" value="true" />
+        <string-array name="read_only_apn_types_string_array" num="1">
+            <item value="*" />
+        </string-array>
     </carrier_config>
 </carrier_config_list>