Fix DreamServiceTest not properly setting flag values

EnableFlags annotation needs the rule to actually work. Also removed
flag enablement from testRedirect as it does not depend on the
flag state.

Test: atest DreamServiceTest
Bug: N/A, drive-by test fix
Flag: NONE test fix
Change-Id: Iec5933e6cfc64bb0bff98177b3ea523282d0d6fe