Move the Android bindings to binderator

[mattleibow]

After a few releases, binderator is quite handy - even for small sets. I found that it was quite nice for Kotlin:

https://github.com/xamarin/XamarinComponents/tree/master/Android/Kotlin

The tool can be invoked:

https://github.com/xamarin/XamarinComponents/blob/798b2efaabc199692b2b23821361c436ca96fa4b/Android/Kotlin/build.cake#L4-L13

And the config can be small:

https://github.com/xamarin/XamarinComponents/blob/798b2efaabc199692b2b23821361c436ca96fa4b/Android/Kotlin/config.json