Shakun Batra’s “Kapoor & Sons” (2016) is the latest example of how Bollywood's portrayal of the family is changing dramatically. The film is about the Kapoors, living in Tamil Nadu’s Coonoor hill station (nobody knows how these Punjabis landed there). The husband and wife (Rajat Kapoor and Ratna Pathak Shah) play a perennially quarrelling married couple,…