Arrange biscuits in 2 rows of 4 biscuits in center of pan, with sides of biscuits just touching. Press or roll biscuits to 14x9-inch rectangle. Spread cream cheese mixture over dough to within 1/2 inch of edges. Using parchment paper, bring long sides of dough over filling, overlapping slightly in center. With fork, lightly beat egg white; brush over top and sides of dough.