watchdog: Implement initialized using the new dbus interface

This makes it possible for the phosphor-host-ipmi or any other watchdog
managing daemon to report to the caller that the watchdog was not configured
if the phosphor-watchdog daemon restarts for any reason.

Change-Id: Iae3a8554c2f5d1cb89368f3ce14b3d44922599c0
Signed-off-by: William A. Kennington III <wak@google.com>
3 files changed