Bye, bye, Philippe Starck. Hello, Benjamin Noriega-Ortiz. The 12-year-old Mondrian, one of West Hollywood’s hottest hotels, will unveil its $40-million Noriega-Ortiz redesign with a big bash tomorrow. Gone is the white-on-white-on-white: instead, think vivid colors, indoor loveseat swings and guestrooms with large fanciful mirrors that double as flat-screen televisions.