Added configuration to determine whether VoLTE requires provisioning.

         provisioning, availability etc -->

    <bool name="config_carrier_volte_available">true</bool>

    <!-- Flag specifying whether VoLTE availability is based on provisioning -->

    <bool name="config_carrier_volte_provisioned">true</bool>

    <bool name="config_auto_attach_data_on_creation">false</bool>

    <!-- service number convert map in roaming network. -->

    <string-array translatable="false" name="dial_string_replace">