麵試時候 ，隻說對找工有利的

You may say nothing about the new position, as if nothing has happenned.

You may say I alrady resigned from the old company and ready to join a new one (but not need tell which one.), so I do not need two weeks notice.

The lesson learned: more careful when do jump next time...

You may try to go back to the old company. Yes, many people did that, and did that more then one times.