Disable flaky FileManagerJsTest.FilesAppEntryTypes

Bug: 1146484
Change-Id: Ie30b17eb2b12c894fdf65bf51d2e1f836ef5c39d
NoTry: True
Tbr: jboulic@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523412


Reviewed-by: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824933}