OPENING Aaraattu (NR) This Indian action thriller stars Mohanlal, Shraddha Srinath, Ramachandra Raju, Siddique, Saikumar, Prabhakar, Sivamani, and A.R. Rahman. (Opens Friday at Cinemark Tinseltown Grapevine) Dog (PG-13) Channing Tatum stars in and co-directs this comedy about an Army Ranger veteran who takes a