[Camera] Implement setting exposure level

[DelphiWorlds]

As per the configureCamera method, here:

https://github.com/ronanamsterdam/capio/blob/master/capio/Controllers/CaptureSessionManager.swift

[MHumm]

At least for Android this is partially in now (querying the min/max possible values would be good to have).

[DelphiWorlds]

Yeah, it's problematic. I'm working on it.

[MHumm]

Thanks! Let's hope you get much of that Camera2 API working. And I also hope this finally inspires EMBT to implement something like this in FMX by default. Maybe they can "buy" your solution? And I even wouldn't care about matching iOS support for such features, at least not for the start ;-)

[DelphiWorlds]

I've recently taken on more work, so my time is a bit light, but the changes to the Camera support are now fairly high priority