google-relay.py: test for a regression of #24023
google-relay.py: test for a regression of #24023

We do this by accepting the call if it's incoming, then making sure that a
stream appears when the relay info has been sent.

mlundblad/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble