If, while watching this new Amy Schumer comedy, you get the feeling that you’ve seen something like it before, you won’t be alone. Once the premise got going, other films that came to mind included body-switching titles like “Freaky Friday” and “13 Going on 30.” This one even quoted from another film with a different but still-related plot device: “Big,” and the business of a young boy putting a coin in an arcade machine and saying, [...]