Constellation Bids \$970 Mln for Mondavi  NEW YORK (Reuters) - Constellation Brands Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=STZ.N target=/stocks/quickinfo/fullquote"&gt;STZ.N&lt;/A&gt; on  Tuesday said it launched an unsolicited \$970 million offer for  Robert Mondavi Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MOND.O target=/stocks/quickinfo/fullquote"&gt;MOND.O&lt;/A&gt;, which is in the midst of a  management shake-up and shifting corporate strategy, in a bid  to bolster its wine portfolio.