fix(AudioSwitch): Don't log crashed when trying to switch application audio endpoint on Windows 7

Fixes SOUNDSWITCH-CZ

Author: Belphemur

SoundSwitch.Audio.Manager/Interop/Client/Extended/Factory/AudioPolicyConfigFactory.cs

@@ -9,6 +9,10 @@ internal sealed class AudioPolicyConfigFactory
 
         public static IAudioPolicyConfig Create()
         {
+            if (Environment.OSVersion.Version.Major < 10)
+            {
+                return new UnsupportedAudioPolicyConfig();
+            }
             if (Environment.OSVersion.Version.Build >= OS_21H2_VERSION)
             {
                 return new Post21H2AudioPolicyConfig();

SoundSwitch.Audio.Manager/Interop/Client/Extended/UnsupportedAudioPolicyConfig.cs

@@ -0,0 +1,20 @@
+using SoundSwitch.Audio.Manager.Interop.Enum;
+using SoundSwitch.Audio.Manager.Interop.Interface.Policy.Extended;
+
+namespace SoundSwitch.Audio.Manager.Interop.Client.Extended;
+
+public class UnsupportedAudioPolicyConfig : IAudioPolicyConfig
+{
+    public void SetPersistedDefaultAudioEndpoint(uint processId, EDataFlow flow, ERole role, string deviceId)
+    {
+    }
+
+    public string? GetPersistedDefaultAudioEndpoint(uint processId, EDataFlow flow, ERole role)
+    {
+        return null;
+    }
+
+    public void ClearAllPersistedApplicationDefaultEndpoints()
+    {
+    }
+}