veyron/runtimes/google/ipc: new Serve method to replace Register+Publish.
veyron/runtimes/google/ipc: new Serve method to replace Register+Publish.

Change-Id: Icc69645e753a3e84c5d87a3e9d2d4abd36275fff

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