Add CarrierConfig for carrier_volte_provisoned

Add the carrier_config for carrier_volte_provisioned_bool. This flag
specifies whether VoLTE availability is based on provisioning.

Bug: 29873049
Change-Id: I8399fe9e16890e641a67643fe8d3c61668bbabb4
diff --git a/assets/carrier_config_311480.xml b/assets/carrier_config_311480.xml
index 976e557..8abaf11 100644
--- a/assets/carrier_config_311480.xml
+++ b/assets/carrier_config_311480.xml
@@ -1,6 +1,7 @@
 <?xml version='1.0' encoding='utf-8' standalone='yes' ?>
 <carrier_config_list>
     <carrier_config>
+        <boolean name="carrier_volte_provisioned_bool" value="true" />
         <boolean name="allow_hold_in_ims_call" value="false" />
         <boolean name="carrier_vt_available_bool" value="true" />
         <boolean name="support_downgrade_vt_to_audio_bool" value="false" />