The trailer features a song from Kanye West with a pulsating beat. Jamie Foxx looks sternly at one of his troops, exclaiming, “I love this job.” Oil fires explode in the desert. Marines “hoo-rah” in anticipation of gory battle. The 30-second commercials you have seen provide pretty much all the action and excitement you can expect to get out of “Jarhead,” the new film by Sam Mendes (American Beauty, Road to Perdition). This is......