I'm building a FireTV HTML5 web app and my FireTV Stick keeps going into Daydream/Screensaver mode. I see from the FAQs (https://developer.amazon.com/public/solutions/devices/fire-tv/docs/amazon-fire-tv-sdk-frequently-asked-questions) that I can disable this using the KEEP_SCREEN_ON flag, but since I'm building an HTML5 app, not an Android app, I don't know how to set this flag.
Is there a way to disable Daydream mode from a FireTV web app?