Prefetch 'pinned' property on directory change

Bug: 1135930
Change-Id: Ia981112e2525fb2b2c883197a1a10f675c9d6142
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2454435Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Austin Tankiang <austinct@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814610}

ui/file_manager/file_manager/foreground/js/constants.js

@@ -54,6 +54,7 @@ constants.LIST_CONTAINER_METADATA_PREFETCH_PROPERTY_NAMES = [
   'hosted',
   'modificationTime',
   'modificationByMeTime',
+  'pinned',
   'shared',
   'size',
   'canCopy',