LOS ANGELES (AP) — When “Red, White & Royal Blue” debuted last summer, it did so without fanfare or spectacle, landing squarely amid historic Hollywood strikes that precluded its stars from lending their press-friendly faces to promote the movie. But the lack of publicity surrounding the Amazon Studios rom-com’s premiere didn’t deter it from becoming a hit with audiences. The streaming service said it was the top watched film on its platform for weeks, and that it brought in a surge of subscribers.