Add mania player test scene

osu.Game.Rulesets.Mania.Tests/TestScenePlayer.cs

@@ -0,0 +1,15 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public class TestScenePlayer : PlayerTestScene
+    {
+        public TestScenePlayer()
+            : base(new ManiaRuleset())
+        {
+        }
+    }
+}