chore(android): serialize account configuration DTO transport

Author: codeion

android/src/main/java/com/carusto/ReactNativePjSip/dto/AccountConfigurationDTO.java

@@ -138,6 +138,7 @@ public JSONObject toJson() {
             json.put("name", getName());
             json.put("username", getUsername());
             json.put("domain", getDomain());
+            json.put("transport", getTransport());
             json.put("contactParams", getContactParams());
             json.put("registration", registration);
             return json;