Migrate ActivityLogEntryPoint.OnSessionStarted to IEventConsumer

MediaBrowser.Controller/Events/Session/SessionStartedEventArgs.cs

@@ -0,0 +1,19 @@
+using Jellyfin.Data.Events;
+using MediaBrowser.Controller.Session;
+
+namespace MediaBrowser.Controller.Events.Session
+{
+    /// <summary>
+    /// An event that fires when a session is started.
+    /// </summary>
+    public class SessionStartedEventArgs : GenericEventArgs<SessionInfo>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SessionStartedEventArgs"/> class.
+        /// </summary>
+        /// <param name="arg">The session info.</param>
+        public SessionStartedEventArgs(SessionInfo arg) : base(arg)
+        {
+        }
+    }
+}