webRtcEndpoint: add test for connection state
webRtcEndpoint: add test for connection state

Change-Id: I61baa62f5d3ce19bc1f741a1bb97de80e97af549

shelsonjava/kms-elements,shelsonjava/kms-elements,TribeMedia/kms-elements,TribeMedia/kms-elements,TribeMedia/kms-elements,shelsonjava/kms-elements