veyron/services/mgmt/device/impl: reconcile app states on restart
veyron/services/mgmt/device/impl: reconcile app states on restart

Add support to the device manager to determine the state of previously
started applications on start and track these applications going
forward.

Change-Id: Ie8e380ff2fcea4a417bb4f4b9c16e0ecaf41b730

vanadium/go.v23,vanadium/go.v23,vanadium/go.v23