Trim and quarter the strawberries and set aside. Combine the blueberries, blackberries, 1/2 cup granulated sugar, 1/3 cup water, lemon zest, juice and salt in a medium saucepot. Bring to a simmer over medium heat and continue to cook, stirring occasionally, until the berries break down and the sauce thickens, 15 to 20 minutes. Remove from the heat and cool.
Place the cream cheese, 1/4 cup cream, the remaining 1/4 cup granulated sugar and the vanilla extract in a large bowl and beat on medium speed until smooth and fluffy. In a second large bowl, whip the remaining cream until stiff peaks form. Fold about one-quarter of the whipped cream into the cream cheese mixture until lightened, and then fold in the remaining whipped cream.
To assemble the trifle, rip or cut the angel food cake into 2-inch pieces. Place half the cake pieces in the bottom of a 12-to-14-cup trifle dish or large bowl. Top with about half the blueberry sauce, half the cream and half the quartered strawberries. Repeat the layers with the remaining cake, berry sauce, cream and strawberries. Cover with plastic wrap and chill 8 hours or overnight. Before serving either dust with confectioners' sugar or heat the apple jelly in the microwave for 25 seconds to loosen, and then brush over the strawberries.