Enable stream quality selection with custom overlay on iPads

[Shingyx]

Is your feature request related to a problem? Please describe. Currently when using the custom overlay, selecting stream quality is disabled on iOS. This means I have to use the default Twitch overlay to select stream quality on my iPad. I also can't use the "Default to highest quality" setting.

Describe the solution you'd like On my iPad, I'd like the ability to select stream quality with the custom overlay, as well as access to the "Default to highest quality" setting.

Describe alternatives you've considered On my iPad, I've been using the app with the custom overlay disabled, and manually selecting the quality each time I open a stream. The "Auto" quality is unstable for me.

Additional context My understanding is that these features were disabled on iOS because iPhones only have access to the "Auto" quality, for whatever reason. However, this limitation doesn't affect iPads. See simulator screenshots below:

iPhone	iPad

I did a quick test locally by removing the if (!Platform.isIOS) checks and it seems to work, but I'm guessing that hiding these settings on iPhones is still desired.

(I was going to do this myself but I couldn't find a good home for the isIpad boolean 😅)