Move GlobalPlayState tracking to Clock.

src/Avalonia.Animation/Animation.cs

@@ -17,10 +17,15 @@ namespace Avalonia.Animation
     /// </summary>
     public class Animation : AvaloniaList<KeyFrame>, IAnimation
     {
+
         /// <summary>
         /// Gets or sets the animation play state for all animations
         /// </summary> 
-        public static PlayState GlobalPlayState { get; set; } = PlayState.Run;
+        public static PlayState GlobalPlayState
+        {
+            get => AvaloniaLocator.Current.GetService<Clock>().PlayState;
+            set => AvaloniaLocator.Current.GetService<Clock>().PlayState = value;
+        }
 
         /// <summary>
         /// Gets or sets the active time of this animation.

src/Avalonia.Animation/Clock.cs

@@ -24,6 +24,8 @@ namespace Avalonia.Animation
 
         public TimeSpan CurrentTime { get; private set; }
 
+        public PlayState PlayState { get; set; }
+
         public void Pulse(long tickCount)
         {
             var time = TimeSpan.FromMilliseconds(tickCount);