MvxColorValueConverter not working on Android in 9.2.0
## 🔙 Regression

I may be missing something, but it appears that MvxColorValueConverter is not working on Android in 9.2.0

### Old (and correct) behavior

### Current behavior

### Reproduction steps

Pull https://github.com/greg73/MvvmCross.git
Checkout branch color-converter-issue
This has been modified to bind to the string property ColorText

Run Playground.Droid
Click on converters
Color text is not visible and doesn't change color when clicking the button

### Configuration

9.2.0-beta6
Android SDK 33

**Platform:** 
- [ ] :iphone: iOS
- [x] :robot: Android
- [ ] :checkered_flag: WPF
- [ ] :earth_americas: UWP
- [ ] :apple: MacOS
- [ ] :tv: tvOS
- [ ] :monkey: Xamarin.Forms
