app-admin/localtoast: add dependency to chronyd.service

One of the CIS benchmarks relies on chronyd being in a stable state:
uid of the process should be that of user "ntp". But the transition
from user root to user ntp happens late in the service initialization
sequence. So there is a chance that cis-compliance-scanner will check
the process at a wrong time, since there is no dependency between
cis-levelX and chronyd service. To fix this add explicit dependency
to chronyd.service.

BUG=b/284075200
TEST=presubmit
RELEASE_NOTE=None

Change-Id: If83d77cb986b005999329382beb54b4955b6bc05
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/49832
Reviewed-by: Michael Kochera <kochera@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
5 files changed