bullhead/apns: Update apns-full-conf.xml

Change protocol to IPv4v6 for Bell/Virgin canada

Bug:64464229
Test: compile
Change-Id: Ibf8dee016ebfd330818cc49d6205d7264b1cfe98
(cherry picked from commit 7c7af72c052fb39c927e85fa7454b64ae84e23c5)
diff --git a/apns-full-conf.xml b/apns-full-conf.xml
index 6080daa..99a8d3d 100644
--- a/apns-full-conf.xml
+++ b/apns-full-conf.xml
@@ -7259,6 +7259,7 @@
       apn="pda.bell.ca"
       type="default,mms,supl"
       mmsc="http://mms.bell.ca/mms/wapenc"
+      protocol="IPV4V6"
   />
 
   <apn carrier="Virgin Mobile"
@@ -7269,6 +7270,7 @@
       mmsc="http://mms.bell.ca/mms/wapenc"
       mvno_match_data="3E"
       mvno_type="gid"
+      protocol="IPV4V6"
   />
 
   <apn carrier="MTS"