agnosticbin2: Add a probe to detect when a new stream is available
agnosticbin2: Add a probe to detect when a new stream is available

Change-Id: I5bff110ce5374498296d38749eefbbaa184c6f45

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