misc: Move the rest of Ryujinx.UI.Common into other parts of the project.

src/Ryujinx/Utilities/Configuration/AudioBackend.cs

@@ -0,0 +1,14 @@
+using Ryujinx.Common.Utilities;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.Ava.Utilities.Configuration
+{
+    [JsonConverter(typeof(TypedStringEnumConverter<AudioBackend>))]
+    public enum AudioBackend
+    {
+        Dummy,
+        OpenAl,
+        SoundIo,
+        SDL2,
+    }
+}