Use dummy player when the URL is not valid

QuickPlay/Configuration.cs

@@ -85,11 +85,12 @@ namespace QuickPlay
                 string filename = playerConfigUrl.Substring("file://".Length);
                 var reader = new StreamReader(filename);
                 cfgProvider = new FileConfigurationProvider(reader);
-            } else if (playerConfigUrl == "default") {
+            } else if (playerConfigUrl == "dummy") {
                 cfgProvider = new DummyConfigurationProvider();
             } else
             {
-                throw new InvalidOperationException("Schema of player config URL not supported");
+                Android.Widget.Toast.MakeText(Android.App.Application.Context, "Schema of player config URL not supported, using dummy", Android.Widget.ToastLength.Short).Show();
+                cfgProvider = new DummyConfigurationProvider();
             }
             PlayerConfiguration playercfg;
             try