There's a sweetness at the heart of Alex Woo's "In Your Dreams," but a movie about imagination can't afford to have so little of its own. A Tootsie Pop of a kids movie whose tough but tasty core is trapped inside layers of semi-flavorless sugar, Netflix Animation’s “ In Your Dreams ” — written and directed by Kuku Studios founder and former Pixar story artist Alex Woo — isn’t quite up to the admirable challenge that it sets for itself: to make an eye-popping and hyper-creative spectacle that