I have not heard of QuickRemote app before. Apparently you can use it to tie into your Roku to control it via voice. The reviews on Android are mixed so not sure if this is a good solution yet.
https://www.howtogeek.com/342806/how-to-control-your-roku-with-google-homes-voice-assistant/
https://play.google.com/store/apps/details?id=com.appestry.clicker&hl=en#details-reviews