WASHINGTON (Reuters) - Arnold Schwarzenegger won top billing in U.S. newspaper editorials on Friday that greeted The Terminator's sensational candidacy for California governor as anything from "surprisingly mindless" to "just the man." Reuters Photo "Muscle Beach Politics," "Conan the Contender," were among the predictable, but irresistible, headlines his candidacy provoked. Others included: "Total Recall," "The Running Man" and "Well, won't this be fun, fellow Americans?" Republican Schwarzenegger, a muscle-bound action hero best known for his role in "The Terminator" movies, began filing papers on Thursday as a candidate in California's Oct. 7 vote to recall Democratic Gov. Gray Davis (news...