Changed protocol from IPV6 to IP for Telus

(This is consistent with Google's APNs config.)
These changes have been thoroughly tested on the Telus mobile network.

More Info...
Telus (from Western Canada) doesn't yet fully support IPV6.  As a
result, Telus customers trying to run LineageOS won't have mobile data.
Telus users (including myself) have been running into this
problem for years.  For example...
https://www.reddit.com/r/LineageOS/comments/hyg5hw/change_apn_settings/

Change-Id: I5085c9463e26da7101106525550f1efef2474c5b

prebuilt/common/etc/apns-conf.xml

@@ -1190,9 +1190,9 @@
   <apn carrier="ProMonte MMS" mcc="297" mnc="01" apn="mms.promonte.com" proxy="" port="" user="mms" password="mms" mmsc="http://mm.vor.promonte.com" mmsproxy="192.168.246.5" mmsport="8080" type="mms" />
   <apn carrier="T-Mobile CG MMS" mcc="297" mnc="02" apn="mms" proxy="" port="" user="38267" password="38267" mmsc="http://192.168.180.100/servlets/mms" mmsproxy="10.0.5.19" mmsport="8080" type="mms" />
   <apn carrier="T-Mobile CG" mcc="297" mnc="02" apn="tmcg-wnw" proxy="" port="" user="38267" password="38267" mmsc="" type="default,supl" />
-  <apn carrier="TELUS SP" mcc="302" mnc="220" apn="sp.telus.com" type="default,mms,supl,hipri,ia" mmsc="http://aliasredirect.net/proxy/mmsc" mmsproxy="mmscproxy.mobility.ca" mmsport="8799" protocol="IPV6" roaming_protocol="IP" mvno_match_data="5455" mvno_type="gid" />
+  <apn carrier="TELUS SP" mcc="302" mnc="220" apn="sp.telus.com" type="default,mms,supl,hipri,ia" mmsc="http://aliasredirect.net/proxy/mmsc" mmsproxy="mmscproxy.mobility.ca" mmsport="8799" protocol="IP" roaming_protocol="IP" mvno_match_data="5455" mvno_type="gid" />
   <apn carrier="TELUS ISP" mcc="302" mnc="220" apn="isp.telus.com" server="*" type="dun" protocol="IP" mvno_match_data="5455" mvno_type="gid" />
-  <apn carrier="TELUS IMS" mcc="302" mnc="220" apn="ims" type="ims" protocol="IPV6" mvno_match_data="5455" mvno_type="gid" user_visible="false" />
+  <apn carrier="TELUS IMS" mcc="302" mnc="220" apn="ims" type="ims" protocol="IP" mvno_match_data="5455" mvno_type="gid" user_visible="false" />
   <apn carrier="Koodo SP" mcc="302" mnc="220" apn="sp.koodo.com" type="*" mmsc="http://aliasredirect.net/proxy/koodo/mmsc" mmsproxy="74.49.0.18" mmsport="80" protocol="IP" roaming_protocol="IP" mvno_match_data="4B4F" mvno_type="gid" />
   <apn carrier="Koodo IMS" mcc="302" mnc="220" apn="ims" type="ims" protocol="IPV6" mvno_match_data="4B4F" mvno_type="gid" />
   <apn carrier="Mobile Internet" mcc="302" mnc="220" apn="sp.mb.com" type="default,mms,supl" mmsc="http://aliasredirect.net/proxy/mb/mmsc" mmsproxy="74.49.0.18" mmsport="80" mvno_match_data="5043" mvno_type="gid" />
@@ -1200,9 +1200,9 @@
   <apn carrier="Mobile Internet" mcc="302" mnc="220" apn="sp.mb.com" type="default,mms,agps,supl,fota,hipri" mmsc="http://aliasredirect.net/proxy/mb/mmsc" mmsproxy="74.49.0.18" mmsport="80" mvno_type="gid" mvno_match_data="4D4F" />
   <apn carrier="Tethered Mobile Internet" mcc="302" mnc="220" apn="isp.mb.com" type="dun" mvno_type="gid" mvno_match_data="4D4F" />
   <apn carrier="Public Mobile" mcc="302" mnc="220" apn="sp.mb.com" mmsc="http://aliasredirect.net/proxy/mb/mmsc" mmsproxy="74.49.0.18" mmsport="80" mvno_match_data="50" mvno_type="gid" type="default,supl,mms" />
-  <apn carrier="TELUS SP" mcc="302" mnc="221" apn="sp.telus.com" type="default,mms,supl,hipri,ia" mmsc="http://aliasredirect.net/proxy/mmsc" mmsproxy="mmscproxy.mobility.ca" mmsport="8799" protocol="IPV6" roaming_protocol="IP" mvno_match_data="5455" mvno_type="gid" />
+  <apn carrier="TELUS SP" mcc="302" mnc="221" apn="sp.telus.com" type="default,mms,supl,hipri,ia" mmsc="http://aliasredirect.net/proxy/mmsc" mmsproxy="mmscproxy.mobility.ca" mmsport="8799" protocol="IP" roaming_protocol="IP" mvno_match_data="5455" mvno_type="gid" />
   <apn carrier="TELUS ISP" mcc="302" mnc="221" apn="isp.telus.com" server="*" type="dun" protocol="IP" mvno_match_data="5455" mvno_type="gid" />
-  <apn carrier="TELUS IMS" mcc="302" mnc="221" apn="ims" type="ims" protocol="IPV6" mvno_match_data="5455" mvno_type="gid" user_visible="false" />
+  <apn carrier="TELUS IMS" mcc="302" mnc="221" apn="ims" type="ims" protocol="IP" mvno_match_data="5455" mvno_type="gid" user_visible="false" />
   <apn carrier="Koodo SP" mcc="302" mnc="221" apn="sp.koodo.com" type="*" mmsc="http://aliasredirect.net/proxy/koodo/mmsc" mmsproxy="74.49.0.18" mmsport="80" protocol="IP" roaming_protocol="IP" mvno_match_data="4B4F" mvno_type="gid" />
   <apn carrier="Koodo IMS" mcc="302" mnc="221" apn="ims" type="ims" protocol="IPV6" mvno_match_data="4B4F" mvno_type="gid" />
   <apn carrier="PC mobile" mcc="302" mnc="221" apn="sp.mb.com" type="default,mms,supl" mmsc="http://aliasredirect.net/proxy/mb/mmsc" mmsproxy="74.49.0.18" mmsport="80" mvno_match_data="5043" mvno_type="gid" />