Correctly layout the WebView

[mattleibow]

Description of Change

Correctly layout the WebView without always expanding to fit page contents.

It appears that Xamarin.Forms also used the parameters in this PR:
https://github.com/xamarin/Xamarin.Forms/blob/5.0.0/Xamarin.Forms.Platform.Android/Renderers/WebViewRenderer.cs#L137

Issues Fixed

• Fixes Youtube player is tiny in MAUI Android Webview #9884
• FIxes Specific website not scrollable in WebView, probably cookie popup issue #9890

Workaround

A workaround for now is to catch the native view when it is loaded and set the layout parameters for Android:

<WebView Source="https://www.youtube.com/watch?v=LXZfrnBasNU" Loaded="WebView_Loaded" />

private void WebView_Loaded(object sender, EventArgs e)
{
#if ANDROID
    var view = sender as WebView;
    var handler = view.Handler;
    var webview = handler?.PlatformView as Android.Webkit.WebView;
    if (webview is not null)
    {
        webview.LayoutParameters = new(
            Android.Views.ViewGroup.LayoutParams.MatchParent,
            Android.Views.ViewGroup.LayoutParams.MatchParent);

    }
#endif

[PureWeen]

Does this cause any weirdness now if you have the WebView in a VerticalStackLayout?

[mattleibow]

Not that I could see. I tried a piece of html that was 1 line and it seemed to size the web view to be 1 line. What was the reason to change this from forms?