Update System.Speech to also recognize Speech_OneCore (#110123)

Author: stephentoub

src/libraries/System.Speech/src/Internal/ObjectToken/ObjectTokenCategory.cs

@@ -21,7 +21,12 @@ protected ObjectTokenCategory(string keyId, RegistryDataKey key)
         internal static ObjectTokenCategory Create(string sCategoryId)
         {
             RegistryDataKey key = RegistryDataKey.Open(sCategoryId, true);
-            return new ObjectTokenCategory(sCategoryId, key);
+            if (key != null)
+            {
+                return new ObjectTokenCategory(sCategoryId, key);
+            }
+
+            return null;
         }
 
         #endregion

src/libraries/System.Speech/src/Internal/ObjectToken/SAPICategories.cs

@@ -59,13 +59,15 @@ internal static int DefaultDeviceOut()
         #endregion
 
         private const string SpeechRegistryKey = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\";
+        private const string SpeechOneCoreRegistryKey = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech_OneCore\";
 
         internal const string CurrentUserVoices = @"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Speech\Voices";
 
         #region internal Fields
 
         internal const string Recognizers = SpeechRegistryKey + "Recognizers";
         internal const string Voices = SpeechRegistryKey + "Voices";
+        internal const string Voices_OneCore = SpeechOneCoreRegistryKey + "Voices";
 
         internal const string AudioIn = SpeechRegistryKey + "AudioInput";
 

src/libraries/System.Speech/src/Internal/Synthesis/VoiceSynthesis.cs

@@ -1480,20 +1480,25 @@ private static List<InstalledVoice> BuildInstalledVoices(VoiceSynthesis voiceSyn
         {
             List<InstalledVoice> voices = new();
 
-            using (ObjectTokenCategory category = ObjectTokenCategory.Create(SAPICategories.Voices))
+            ReadOnlySpan<string> categoryIds = [SAPICategories.Voices, SAPICategories.Voices_OneCore];
+            foreach (string categoryId in categoryIds)
             {
-                if (category != null)
+                using (ObjectTokenCategory category = ObjectTokenCategory.Create(categoryId))
                 {
-                    // Build a list with all the voicesInfo
-                    foreach (ObjectToken voiceToken in category.FindMatchingTokens(null, null))
+                    if (category != null)
                     {
-                        if (voiceToken != null && voiceToken.Attributes != null)
+                        // Build a list with all the voicesInfo
+                        foreach (ObjectToken voiceToken in category.FindMatchingTokens(null, null))
                         {
-                            voices.Add(new InstalledVoice(voiceSynthesizer, new VoiceInfo(voiceToken)));
+                            if (voiceToken != null && voiceToken.Attributes != null)
+                            {
+                                voices.Add(new InstalledVoice(voiceSynthesizer, new VoiceInfo(voiceToken)));
+                            }
                         }
                     }
                 }
             }
+
             return voices;
         }