runtime/mgmt: Fix TestDeviceManagerUpdateAndRevert in new rpc.
runtime/mgmt: Fix TestDeviceManagerUpdateAndRevert in new rpc.

Change-Id: I675d31b94feff5f957f5724d10f210324463e915

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref