VoiceCall Target resource

This small changes allows you to select the resource you want to call (if multiples exist).
Before, you saw the target name (without resource) the amount of times of resources +1.
No matter which one chosen, called always the preferred one.

The hack in my solution is not the best one, but it works at least for xmpp voice.

I don't know if this problem would exist with other protocols too.

(more information on "MainToolBar.call : Display chat transport resource name along with name")
Might be better to call smack StringUtils parseResource, and check if resource string is non-empty. That way, if the method to check resource changes, it will still work correctly.