Explicitly grant gwsq viewSecondaryEmails permission

gwsq was previously granted modify account permission as a
workaround to view secondary email addresses. Gerrit has now
added a new viewSecondaryEmails capability specifically for this
use case.

Bug: b/279702981
Change-Id: Idaf113461c579f990dc0b9bd90a17fb9c1fb87dc
Reviewed-on: https://chromium-review.googlesource.com/c/All-Projects/+/4482374
Reviewed-by: Joanna Wang <jojwang@chromium.org>