Preheat oven to 375°.
Combine first 7 ingredients in a medium bowl; toss well. Spoon into an 8-inch square baking dish coated with cooking spray.
Lightly spoon 1/2 cup flour into dry measuring cup; level with a knife. Combine flour, oats, 1/3 cup sugar, brown sugar, and cinnamon in a medium bowl; cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Spoon over berry mixture; coat top with cooking spray.
Bake at 375° for 40 minutes or until topping is golden and filling is bubbly. Serve warm topped with ice cream.