Don't call getUserMedia() when an audioStream to send is defined
Don't call getUserMedia() when an audioStream to send is defined

Change-Id: I990409670852eb252fefbf1ba19cf029838f2058

shelsonjava/kurento-utils-js,lcamacho/kurento-utils-js,lcamacho/kurento-utils-js,shelsonjava/kurento-utils-js