[Ryujinx.Audio.Backends.SoundIo] Address dotnet-format issues (#5360)

* dotnet format style --severity info

Some changes were manually reverted.

* Address dotnet format CA1816 warnings

* Address dotnet format CA1401 warnings

* Address most dotnet format whitespace warnings

* Run dotnet format after rebase and remove unused usings

- analyzers
- style
- whitespace

* Simplify properties and array initialization, Use const when possible, Remove trailing commas

* Revert "Simplify properties and array initialization, Use const when possible, Remove trailing commas"

This reverts commit 9462e4136c0a2100dc28b20cf9542e06790aa67e.

* dotnet format whitespace after rebase

* Address review feedback

src/Ryujinx.Audio.Backends.SoundIo/Native/SoundIoContext.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Reflection.Metadata;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Threading;