Tom Cruise has decided not to take legal action against the pranksters who squirted water in his face at the London premiere of War of the Worlds on Sunday night.   Cruise was angered when water from a fake microphone squirted in his face while conducting interviews on the red carpet. His spokesperson told Entertainment Tonight that Cruise will not pursue the matter.   After the incident, the man who played the joke on Cruise and three of his crew members were taken into custody by authorities. They were released several hours later on bail, according to police, and ordered to return next month to face possible charges.