Add LocalUserPlayInfo interface to convey common information about player status

osu.Game/Screens/Play/ILocalUserPlayInfo.cs

@@ -0,0 +1,17 @@
+// 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.Framework.Allocation;
+using osu.Framework.Bindables;
+
+namespace osu.Game.Screens.Play
+{
+    [Cached]
+    public interface ILocalUserPlayInfo
+    {
+        /// <summary>
+        /// Whether the local user is currently playing.
+        /// </summary>
+        public IBindable<bool> IsPlaying { get; }
+    }
+}