Add modem-cognitive flag to TMO IMS APN; add AT&T IMS APN

Change-Id: I7f6ef58ce296dcc017630980494acac0baf6f17d
diff --git a/etc/apns-full-conf.xml b/etc/apns-full-conf.xml
index aa0c9e6..50c9595 100755
--- a/etc/apns-full-conf.xml
+++ b/etc/apns-full-conf.xml
@@ -8967,6 +8967,7 @@
       mnc="260"
       apn="ims"
       type="ims"
+      modem_cognitive="true"
       protocol="IPV6"
   />
 
@@ -9449,6 +9450,15 @@
       type="default,supl,mms"
   />
 
+ <apn carrier="ATT IMS"
+      mcc="310"
+      mnc="410"
+      apn="ims"
+      type="ims"
+      modem_cognitive="true"
+      protocol="IPV4V6"
+  />
+
   <apn carrier="Defense Mobile"
       mcc="310"
       mnc="410"