NetflixHeart of Stone stars Gal Gadot as Rachel Stone, a secret agent who completes her assignments by using an AI known as the Heart, and yes, this is a real movie and not some Saturday Night Live sketch or social-media meme. Nonetheless, as far as feature-length films go, it’s certainly an unintentionally amusing joke.Debuting on Netflix during the dog days of August (11, to be precise) presumably in the hope that it’ll vanish without attracting too much attention, Tom Harper’s streaming effor