Fix Android song unable to find a specified URI

- `Assets.OpenFd` throw if the given filename does not exist.
- So a hack to try `OpenFd` if not `SetDataSource` next with cascading `try/catch`.

MonoGame.Framework/Platform/Media/Song.Android.cs

@@ -82,11 +82,25 @@ internal void Play(TimeSpan? startPosition)
             }
             else
             {
-                var afd = Game.Activity.Assets.OpenFd(_name);
-                if (afd == null)
-                    return;
-
-                _androidPlayer.SetDataSource(afd.FileDescriptor, afd.StartOffset, afd.Length);
+                // Try the game's assets if we are using the ContentManager, otherwise, try
+                // if the name refers to a file directly..
+                try
+                {
+                    var afd = Game.Activity.Assets.OpenFd(_name);
+                    _androidPlayer.SetDataSource(afd.FileDescriptor, afd.StartOffset, afd.Length);
+                }
+                catch (Exception)
+                {
+                    try
+                    {
+                        _androidPlayer.SetDataSource(_name);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine(e);
+                        // At this point, it's too late to do anything, so log an error (silently).
+                    }
+                }
             }