“Too many foster children have been unheard, unrepresented, uncared for. It’s time to make our nation’s foster kids a priority … Speak up. Foster. Adopt. Their lives hang in the balance,” the familiar voice says in the animated short promoting the new movie, “Foster Boy.” It’s the voice of retired NBA Hall of Famer Shaquille O’Neal, speaking about a new film for which he is both executive and presenting producer. “Foster Boy” is based on the work of Chicago attorney Jay Paul Deratany, who for 20 years has been fighting on behalf of children abused or killed while under the care of private foster care firms contracted by state child welfare agencies, beginning with Illinois.