GitLab

Move Accessibility settings and tests to subpackage, and rename
according to go/clank-preferences-refactor naming conventions.

Bug: 876376, 1030446
Change-Id: Ib0cdb031cf43fb2b93de8447e2c45af4ab18936b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949534Reviewed-by: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Ender <ender@google.com>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721819}