[Unity][Android] Fix 'Sync and Google services' Settings strings

This CL changes strings used in sync_and_services_preferences, changing
wording to make the string grammatically correct. It also fixes a typo.

Bug: 864791, 864789
Change-Id: I38ee3efb2894562606f6997113aa2d9a81787ef5
Reviewed-on: https://chromium-review.googlesource.com/1142149
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576311}
1 file changed