By TOM KRISHER, AP Auto Writer DETROIT (AP) — Tesla has picked Austin, Texas, and Tulsa, Oklahoma, as finalists for its new U.S. assembly plant, a person briefed on the matter said Friday. The person says company officials visited Tulsa in the past week and were shown two sites. It wasn't clear if there were any other finalists in the mix. The person, who didn't want to be identified because the site