[Xamarin.Android.Tools.AndroidSdk] Eclipse Adoptium support (#132)

Context: https://blog.adoptopenjdk.net/2021/03/transition-to-eclipse-an-update/
Context: https://projects.eclipse.org/projects/adoptium

AdoptOpenJDK has moved to the Eclipse foundation, and made three name
changes in the process:

 1. The project is now known as Eclipse Adoptium.

 2. The macOS installation directory now matches the file glob
    `temurin-*.jdk`, not `adoptopenjdk-*.jdk`.

 3. The Windows installation directory now installs into e.g.
    `%ProgramFiles%\Eclipse Foundation\jdk-*`, not e.g.
    `%ProgramFiles%\AdoptOpenJDK\jdk-*`.

Rename `AdoptOpenJdkLocations.cs` to `EclipseAdoptiumJdkLocations.cs`,
and check for *both* the "legacy" AdoptOpenJDK and new
Eclipse Adoptium paths.

Author: jonpryor

src/Xamarin.Android.Tools.AndroidSdk/JdkInfo.cs

@@ -289,7 +289,7 @@ public static IEnumerable<JdkInfo> GetKnownSystemJdkInfos (Action<TraceLevel, st
 				.Concat (JdkLocations.GetPreferredJdks (logger))
 				.Concat (XAPrepareJdkLocations.GetXAPrepareJdks (logger))
 				.Concat (MicrosoftOpenJdkLocations.GetMicrosoftOpenJdks (logger))
-				.Concat (AdoptOpenJdkLocations.GetAdoptOpenJdks (logger))
+				.Concat (EclipseAdoptiumJdkLocations.GetEclipseAdoptiumJdks (logger))
 				.Concat (AzulJdkLocations.GetAzulJdks (logger))
 				.Concat (OracleJdkLocations.GetOracleJdks (logger))
 				.Concat (VSAndroidJdkLocations.GetVSAndroidJdks (logger))
@@ -305,6 +305,7 @@ public static IEnumerable<JdkInfo> GetKnownSystemJdkInfos (Action<TraceLevel, st
 		internal static IEnumerable<JdkInfo> GetPreferredJdkInfos (Action<TraceLevel, string> logger)
 		{
 			return MicrosoftOpenJdkLocations.GetMicrosoftOpenJdks (logger)
+				.Concat (EclipseAdoptiumJdkLocations.GetEclipseAdoptiumJdks (logger))
 				.Concat (MicrosoftDistJdkLocations.GetMicrosoftDistJdks (logger))
 				;
 		}

src/Xamarin.Android.Tools.AndroidSdk/Jdks/AdoptOpenJdkLocations.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace Xamarin.Android.Tools {
+
+	class EclipseAdoptiumJdkLocations : JdkLocations {
+
+		internal static IEnumerable<JdkInfo> GetEclipseAdoptiumJdks (Action<TraceLevel, string> logger)
+		{
+			return GetMacOSSystemJdks ("temurin-*.jdk", logger)
+				.Concat (GetMacOSSystemJdks ("adoptopenjdk-*.jdk", logger))
+				.Concat (GetWindowsFileSystemJdks (Path.Combine ("AdoptOpenJDK", "jdk-*"), logger))
+				.Concat (GetWindowsRegistryJdks (logger, @"SOFTWARE\AdoptOpenJDK\JDK", "*", @"hotspot\MSI", "Path"))
+				.Concat (GetWindowsFileSystemJdks (Path.Combine ("Eclipse Foundation", "jdk-*"), logger))
+				.Concat (GetWindowsRegistryJdks (logger, @"SOFTWARE\Eclipse Foundation\JDK", "*", @"hotspot\MSI", "Path"))
+				.OrderByDescending (jdk => jdk, JdkInfoVersionComparer.Default);
+		}
+	}
+}