[quickview] Closure define the QuickViewParams |hasTask| property

QuickViewParams does not define the |hasTask| property, so the Closure
compile can't type-check its value. Define the |hasTask| property.

Tbr: alex
Bug: 803259
Change-Id: I62e6ad46ca7176298a4d9cd0d5cc466b326d0b3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2035634Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737969}

ui/file_manager/file_manager/foreground/js/quick_view_controller.js

@@ -641,6 +641,7 @@ QuickViewController.UNSUPPORTED_IMAGE_SUBTYPES_ = [
  *   type: string,
  *   subtype: string,
  *   filePath: string,
+ *   hasTask: boolean,
  *   contentUrl: (string|undefined),
  *   videoPoster: (string|undefined),
  *   audioArtwork: (string|undefined),