Add support for from and to fields in SEND_MESSAGE handling

Add support for basic SIP/SIMPLE Messaging

To enable FS to send incoming msgs to ecallmgr you need to add the following to the sip_profile

            <param name="fire-message-events" value="true"/>

Then in order to forward outgoing msgs to the device you need this patch in order to get the correct from and to fields in the SIP MESSAGE