veyron/google/rt/runtimex: Add preferred protocols to runtime init for profile to call.
veyron/google/rt/runtimex: Add preferred protocols to runtime
init for profile to call.

Change-Id: Id5fe6e357258ca2fd9092df6a8858ab098fa2d92

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