Now rated third, ABC faces uphill battle     ABC to test viewers before cameras roll     TV REVIEWS; 'PASSIONS' AND 'BOOKER' ON TONIGHT     Jessie and Hunter: the tube's kissing cousins     Crime Pays in Prime Time     THE NEW SEASON TUESDAY     ABC's police shrink show seems a little hyperactive     For the new TV season we have . . .     ABC drops Happy Days, Hart to Hart     The Message: Hands Off