[tests] add test for Microsoft.Intune (#7926)

Context: https://www.nuget.org/packages/Microsoft.Intune.Maui.Essentials.android/9.5.2-beta

The `Microsoft.Intune.Maui.Essentials.android` makes use of specific
MSBuild targets and "remapping" features.

We should add a test verifying that it stays working over time.

Assert `MainActivity.onMAMCreate` exists in `classes.dex`, to verify this package actually
"does something". Otherwise, the test would just pass if we removed
the Intune package.

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Android/KnownPackages.cs

@@ -592,6 +592,10 @@ namespace Xamarin.ProjectTools
 			Id = "SkiaSharp.Views",
 			Version = "2.88.3",
 		};
+		public static Package Microsoft_Intune_Maui_Essentials_android = new Package {
+			Id = "Microsoft.Intune.Maui.Essentials.android",
+			Version = "10.0.0-beta",
+		};
 	}
 }
 

tests/MSBuildDeviceIntegration/Tests/InstallAndRunTests.cs

@@ -1170,5 +1170,39 @@ namespace UnnamedProject
 				Assert.IsTrue (didLaunch, "Activity should have started.");
 			}
 		}
+
+		[Test]
+		public void MicrosoftIntune ([Values (false, true)] bool isRelease)
+		{
+			proj = new XamarinAndroidApplicationProject {
+				IsRelease = isRelease,
+				PackageReferences = {
+					KnownPackages.AndroidXAppCompat,
+					KnownPackages.Microsoft_Intune_Maui_Essentials_android,
+				},
+			};
+			proj.MainActivity = proj.DefaultMainActivity
+				.Replace ("Icon = \"@drawable/icon\")]", "Icon = \"@drawable/icon\", Theme = \"@style/Theme.AppCompat.Light.DarkActionBar\")]")
+				.Replace ("public class MainActivity : Activity", "public class MainActivity : AndroidX.AppCompat.App.AppCompatActivity");
+			var abis = new string [] { "armeabi-v7a", "arm64-v8a", "x86", "x86_64" };
+			proj.SetAndroidSupportedAbis (abis);
+			builder = CreateApkBuilder ();
+			builder.BuildLogFile = "install.log";
+			Assert.IsTrue (builder.Install (proj), "Install should have succeeded.");
+
+			var intermediate = Path.Combine (Root, builder.ProjectDirectory, proj.IntermediateOutputPath);
+			var dexFile = Path.Combine (intermediate, "android", "bin", "classes.dex");
+			FileAssert.Exists (dexFile);
+			var className = "Lcom/xamarin/microsoftintune/MainActivity;";
+			var methodName = "onMAMCreate";
+			Assert.IsTrue (DexUtils.ContainsClassWithMethod (className, methodName, "(Landroid/os/Bundle;)V", dexFile, AndroidSdkPath), $"`{dexFile}` should include `{className}` and `{methodName}!");
+
+			RunProjectAndAssert (proj, builder);
+
+			WaitForPermissionActivity (Path.Combine (Root, builder.ProjectDirectory, "permission-logcat.log"));
+			bool didLaunch = WaitForActivityToStart (proj.PackageName, "MainActivity",
+				Path.Combine (Root, builder.ProjectDirectory, "logcat.log"), 30);
+			Assert.IsTrue (didLaunch, "Activity should have started.");
+		}
 	}
 }