Add firmware mauv to the dbus state Adding an interface in Dbus for redfishz to query this values for telemetry. This uses the hothd data pipeline and store to put the firmware mauv into the dbus state. TEST= https://paste.googleplex.com/5565207670292480 Change-Id: I5a68b42c833c8b8619dfecb73535cf1e2d0c57c8 Signed-off-by: Ellis Sarza-Nguyen <sarzanguyen@google.com>