TESTERS WANTED: RyuLDN implementation (#65)

These changes allow players to matchmake for local wireless using a LDN
server. The network implementation originates from Berry's public TCP
RyuLDN fork. Logo and unrelated changes have been removed.

Additionally displays LDN game status in the game selection window when
RyuLDN is enabled.

Functionality is only enabled while network mode is set to "RyuLDN" in
the settings.

src/Ryujinx.UI.Common/App/ApplicationData.cs

@@ -27,6 +27,8 @@ namespace Ryujinx.UI.App.Common
         public ulong Id { get; set; }
         public string Developer { get; set; } = "Unknown";
         public string Version { get; set; } = "0";
+        public int PlayerCount { get; set; }
+        public int GameCount { get; set; }
         public TimeSpan TimePlayed { get; set; }
         public DateTime? LastPlayed { get; set; }
         public string FileExtension { get; set; }