Two stars. Rated R. In English and some Spanish with subtitles. 83 minutes. Salma Hayek is virtually unrecognizable in “Beatriz at Dinner,” a sad-eyed parable in which she plays a massage therapist and healer in Southern California whose car breaks down at the home of a wealthy client, pushing her into an Alice-like plunge through the looking glass of race and class, friendship and professionalism, and liberal earnestness and hypocrisy. As the movie opens, Hayek’s title character can be seen praying in front of a shrine that includes photos of her ancestors and a beloved pet goat, whose untimely demise plays an unlikely role in the day that unfolds.