Update AvaloniaView.razor.cs
Update AvaloniaView.razor.cs

modified pointer up, down, move to handle touch device specifically and all other devices as mouse event

AvaloniaUI/Avalonia,SuperJMN/Avalonia,SuperJMN/Avalonia,grokys/Perspex,SuperJMN/Avalonia,SuperJMN/Avalonia,AvaloniaUI/Avalonia,SuperJMN/Avalonia,AvaloniaUI/Avalonia,SuperJMN/Avalonia,AvaloniaUI/Avalonia,SuperJMN/Avalonia,AvaloniaUI/Avalonia,grokys/Perspex,AvaloniaUI/Avalonia,AvaloniaUI/Avalonia