GitLab

Before this CL all OS and Browser strings were saved in settings_strings.grdp
This CL begins the process of moving ChromeOS specific strings from
settings_strings.grdp to os_settings_strings.grdp. Specifically moving
only a11y strings.

Bug: 967883
Change-Id: I4364e6ba340e40514c02065b0ea9811c666e1369
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2054625
Commit-Queue: Nnamdi Theodore Johnson-kanu <tjohnsonkanu@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742439}