[Android] Fix Border clipping issues

[jsuarezruiz]

Description of Change

(Work in progress)

Fix Border clipping issues on Android.

The issue mentions problems in Windows, but I can't reproduce them.

Added a golden test to validate this scenario.

Issues Fixed

Fixes #18071

[jsuarezruiz]

Added another test to validate the Border with different shapes and strokes

[jonmdev]

Does this fix by any chance also fix this issue?

#17882

It would be really great to get a fix for that too. If both these are fixed we can get consistent predictable layouts with Borders which is really critical for putting out any projects using Borders. It would help a lot.

Currently, between both of these bugs it is very hard to know how anything will look on any given platform or consistently control it.

[jonmdev]

Also, I hate to pile on, but I just remembered in iOS we also have this pretty bad bug, which I think might be due to automatic iOS animation tweening of the object preventing it from reaching the target size immediately:

#18204

If we could get all three of these fixed (the masking, the drawing to the edges, and the iOS lagging) Border would be pretty solid for use and it would be appreciated. Thanks again.

[ghost]

Hi @jsuarezruiz.
It seems you haven't touched this PR for the last two weeks. To avoid accumulating old PRs, we're marking it as stale. As a result, it will be closed if no further activity occurs within 4 days of this comment. You can learn more about our Issue Management Policies here.

[activa]

Your test shows this:

That's not how it's supposed to render though. The border is cut off in the rounded corners.

This is more obvious in the following test case:

On Windows and iOS it renders correctly:

The above is using the following XAML:

<Border Stroke="Black" StrokeThickness="8"
        StrokeShape="RoundRectangle 30,0,0,30" 
        WidthRequest="200" HeightRequest="200">
    <Grid RowDefinitions="Auto,*" >
        <BoxView Color="Red" Grid.Row="0" HeightRequest="50"/>
        <BoxView Color="Green" Grid.Row="1" />
    </Grid>
</Border>