[Android] Fix shadows size in clipped views (dotnet#11603) Fixes dotn…

…et#11578

* Fix shadows clipping views

* Fix build errors

* Capture and cache Context usage

We've found Context can be a bit expensive to get in a large frequency of calls (dotnet#8001), so we can avoid this by capturing and caching the instance.

* Removed duplicated test

* Revert latest changes

---------

Co-authored-by: redth <jondick@gmail.com>
Co-authored-by: Rachel Kang <rachelkang@microsoft.com>

src/Core/src/Platform/Android/WrapperView.cs

@@ -268,7 +268,8 @@ void DrawShadow(Canvas canvas)
 					else
 					{
 						var bounds = new Graphics.RectF(0, 0, canvas.Width, canvas.Height);
-						var path = Clip.PathForBounds(bounds)?.AsAndroidPath();
+						var density = Context.GetDisplayDensity();
+						var path = Clip.PathForBounds(bounds)?.AsAndroidPath(scaleX: density, scaleY: density);
 
 						path.Offset(shadowOffsetX, shadowOffsetY);