fix: Fix onUpdateEnd when the MSE engine has been destroyed (#8591)

Related to #8491

Author: avelad

lib/media/media_source_engine.js

@@ -1944,7 +1944,20 @@ shaka.media.MediaSourceEngine = class {
    * @private
    */
   onUpdateEnd_(contentType) {
-    if (this.reloadingMediaSource_) {
+    // If we're reloading or have been destroyed, clear the queue for this
+    // content type.
+    if (this.reloadingMediaSource_ || this.destroyer_.destroyed()) {
+      // Resolve any pending operations in this content type's queue
+      const queue = this.queues_.get(contentType);
+      if (queue && queue.length) {
+        // Resolve the first operation that triggered this updateEnd
+        const firstOperation = queue[0];
+        if (firstOperation && firstOperation.p) {
+          firstOperation.p.resolve();
+        }
+        // Clear the rest of the queue
+        this.queues_.set(contentType, []);
+      }
       return;
     }
     const operation = this.queues_.get(contentType)[0];