user_acivity: Changed the paths and names for some Chrome OS groups.

BUG=None
TEST=None

Change-Id: I1124c62a67394f5f43e003338bad83855539e76a
Reviewed-on: https://chrome-internal-review.googlesource.com/292637


Tested-by: Evelina Dumitrescu <evelinad@google.com>
Reviewed-by: Evelina Dumitrescu <evelinad@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/435922


Commit-Ready: Luis Lozano <llozano@chromium.org>
Tested-by: Luis Lozano <llozano@chromium.org>