fix: Silence aborted errors from PreloadManager. (#7619)

Closes #7618

Author: theodab

lib/media/preload_manager.js

@@ -403,7 +403,12 @@ shaka.media.PreloadManager = class extends shaka.util.FakeEventTarget {
 
         this.successPromise_.resolve();
       } catch (error) {
-        this.successPromise_.reject(error);
+        // Ignore OPERATION_ABORTED and OBJECT_DESTROYED errors.
+        if (!(error instanceof shaka.util.Error) ||
+            (error.code != shaka.util.Error.Code.OPERATION_ABORTED &&
+             error.code != shaka.util.Error.Code.OBJECT_DESTROYED)) {
+          this.successPromise_.reject(error);
+        }
       }
     })();
   }