Unneccesary boxing of DpiScale on hot path "SetDpiScaleVisualFlags"

[yingDev]

wpf/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Visual.cs

Lines 4999 to 5012 in 89d172d

	internal void SetDpiScaleVisualFlags(DpiRecursiveChangeArgs args)
	{
	_flags = args.DpiScaleFlag1 ? (_flags | VisualFlags.DpiScaleFlag1) : (_flags & ~VisualFlags.DpiScaleFlag1);
	_flags = args.DpiScaleFlag2 ? (_flags | VisualFlags.DpiScaleFlag2) : (_flags & ~VisualFlags.DpiScaleFlag2);
	if (args.DpiScaleFlag1 && args.DpiScaleFlag2)
	{
	DpiIndex.SetValue(this, args.Index);
	}
	if (!args.OldDpiScale.Equals(args.NewDpiScale))
	{
	OnDpiChanged(args.OldDpiScale, args.NewDpiScale);
	}
	}

if (!args.OldDpiScale.Equals(args.NewDpiScale)) 

[h3xds1nz]

@singhashish-wpf This was fixed with #6309, so it can be closed. Theoretically editing the original PR to add "Fixes #5696" could allow linking it for clarity/future reference.