[generator] FixupMethodOverrides() checks properties

[jonathanpeppers]

Context: #1313
Fixes: dotnet/android#10509

In .NET 10 RC 1, View.Foreground is defined in C# as:

[SupportedOSPlatform("android23.0")]
public virtual Drawable? Foreground { get; set; }

But FrameLayout.Foreground is defined as:

[UnsupportedOSPlatform("android23.0")]
public override Drawable? Foreground { get; set; }

I think this is the exact same bug that was addressed in #1313 for methods, but we still have the issue for properties. I was able to duplicate the test and make a getThing() and setThing() methods in Java to see the issue.

I updated the FixupMethodOverrides() to iterate over properties and do the same fixup for property getters and setters.

[jonathanpeppers]

These APIs look OK now:

I still see this one, though:

[jonathanpeppers]

Ok, the latest changes look OK for this API now:

I'm going to add a test in dotnet/android that has code like:

new FrameLayout(this).Foreground = null;
new ListView(this).Adapter = null;

// these do not cause errors in a Java Android project
// using those stat below API 29 works without problem
// likely related: https://stackoverflow.com/questions/64376737 
var a = MediaStore.Video.IVideoColumns.DateTaken;
var b = MediaStore.Images.IImageColumns.DateTaken;