Enable more tests to run on all 3 runtimes, part 13

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Utilities/PackageUtils.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Text;
+using Xamarin.Android.Tasks;
+using Xamarin.ProjectTools;
+
+namespace Xamarin.Android.Build.Tests;
+
+class PackageUtils
+{
+	/// <summary>
+	/// Constructs Android package name parameter for the <see cref="XamarinAndroidApplicationProject" /> which includes
+	/// the runtime used to build and run the application. A unique per-runtime package name is necessary so that elements
+	/// of different runtimes don't mix when running the same test for several of them.
+	/// </summary>
+	public static string MakePackageName (AndroidRuntime runtime, [CallerMemberName] string packageName = "")
+	{
+		if (String.IsNullOrEmpty (packageName)) {
+			throw new ArgumentException ("Must not be null or empty", nameof (packageName));
+		}
+
+		var sb = new StringBuilder (packageName);
+		sb.Append ('_');
+		sb.Append (runtime.ToString ().ToLowerInvariant ());
+
+		return sb.ToString ();
+	}
+}