TBR v.io/x/ref: fix server-side streaming send
TBR v.io/x/ref: fix server-side streaming send

Change-Id: I182fa63b957a47022b4d4d2464bf4e9f0b3ae914

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