I have submitted a request to the Word Product Team for them to modify the Table Style modification feature to allow this option to be set for a Table Style.
At the moment, that option cannot be set when modifying a Table Style, and even though that box appears to be unchecked, when the option is accessed via the Table Properties dialog (after applying the Table Style) the option to "Automatically resize to fit contents" remains in effect.
You might also make a request for the feature via http://word.uservoice.com/