Two Seattle companies, Car Toys and Wireless Advocates, are moving their headquarters to a new South Lake Union office building that is wrapping up construction. Dan Brettler, chairman and CEO of the two companies, said Thursday they're taking the sixth and seventh floors of the 13-story 400 Fairview building, which Skanska USA is developing. Scheduled to happen late this year or early next, the relocations are a consolidation of sorts for the two separate companies: the 900-employee Car Toys and...