Use kDecrypt in settings

For settings we do need more than just verify permissions which is why
this change is needed.

Change-Id: I6634c23bb3ea595303348fa7e6cb218a9750effc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5756895
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Auto-Submit: Hardik Goyal <hardikgoyal@chromium.org>
Reviewed-by: Elie Maamari <emaamari@google.com>
Commit-Queue: Hardik Goyal <hardikgoyal@chromium.org>
Commit-Queue: Elie Maamari <emaamari@google.com>
Cr-Commit-Position: refs/heads/main@{#1337296}