Fix [Android] Image AspectFill is not honored

src/Controls/tests/TestCases.HostApp/Issues/Issue21368.xaml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue21368">
+
+
+        <HorizontalStackLayout Spacing="40" Padding="10">
+            <VerticalStackLayout>
+                <Image Source="dotnet_bot.png" Aspect="AspectFit" HeightRequest="40" WidthRequest="50"
+                HorizontalOptions="Center" VerticalOptions="Center"/>
+                <Label Text="AspectFit" AutomationId="Label"/>
+            </VerticalStackLayout>
+            <VerticalStackLayout>
+                <Image Source="dotnet_bot.png" Aspect="AspectFill" WidthRequest="50" HeightRequest="40"
+                HorizontalOptions="Center" VerticalOptions="Center"/>
+                <Label Text="AspectFill"/>
+            </VerticalStackLayout>
+        </HorizontalStackLayout>
+
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue21368.xaml.cs

@@ -0,0 +1,11 @@
+namespace Maui.Controls.Sample.Issues;
+
+[XamlCompilation(XamlCompilationOptions.Compile)]
+[Issue(IssueTracker.Github, 21368, "Image AspectFill is not honored", PlatformAffected.Android)]
+public partial class Issue21368 : ContentPage
+{
+	public Issue21368()
+	{
+		InitializeComponent();
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue21368.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+    public class Issue21368 : _IssuesUITest
+    {
+        public override string Issue => "Image AspectFill is not honored";
+
+        public Issue21368(TestDevice device) : base(device)
+        {
+        }
+
+		[Test]
+		[Category(UITestCategories.Image)]
+		[FailsOnMac]
+		public void VerifyImageAspects()
+        {
+            App.WaitForElement("Label");
+            VerifyScreenshot();
+        }
+    }
+}

src/Core/src/Platform/Android/ImageViewExtensions.cs

@@ -17,6 +17,11 @@ public static void Clear(this ImageView imageView)
 
 		public static void UpdateAspect(this ImageView imageView, IImage image)
 		{
+			if (image.Aspect is Aspect.AspectFill)
+				imageView.SetAdjustViewBounds(false);
+			else
+				imageView.SetAdjustViewBounds(true);
+
 			imageView.SetScaleType(image.Aspect.ToScaleType());
 		}