set transport value using socket (#449)

Co-authored-by: Volsavr <[email protected]>

Author: Volsavr

lib/src/ua.dart

@@ -880,8 +880,14 @@ class UA extends EventManager {
     // User no_answer_timeout.
     _configuration.no_answer_timeout *= 1000;
 
+    //Default transport initialization
     String transport = _configuration.transportType?.name ?? 'WS';
 
+    //Override transport from socket
+    if(transport == 'WS' && _socketTransport != null){
+      transport = _socketTransport!.via_transport;
+    }
+
     // Via Host.
     if (_configuration.contact_uri != null) {
       _configuration.via_host = _configuration.contact_uri.host;