message: Fix serviceIcon type
diff: <description> The type of service that is to be offered by this app </description>
  </param>
  - <param name="serviceIcon" type="String" mandatory="false">
  + <param name="serviceIcon" type="Image" mandatory="false">
  <description> The file name of the icon to be associated with this service. Most likely the same as the appIcon. </description>
  </param>
  