Add Carrier Config for Verizon to make WFC the default mode.

b/28384577

Change-Id: Ia6632c014b5daeee1ca528328aaa70e9a3cbf039
diff --git a/assets/carrier_config_310004.xml b/assets/carrier_config_310004.xml
index 71a87fb..abbc869 100644
--- a/assets/carrier_config_310004.xml
+++ b/assets/carrier_config_310004.xml
@@ -27,5 +27,6 @@
         <boolean name="allow_adding_apns_bool" value="false" />
         <boolean name="broadcast_emergency_call_state_changes_bool" value="true" />
         <string name="carrier_eri_file_name_string">eri_311480.xml</string>
+        <int name="carrier_default_wfc_ims_mode_int" value="1"/>
     </carrier_config>
 </carrier_config_list>