Bug: recognizeMicrophone RecognizeStream emits data events with empty result arrays on Safari 12.0

[jeff-arn]

SDK Version: 0.35.4
Browser: Safari 12.0

Expected Behavior: after calling recognizeMicrophone and handling the resulting stream, the data event that is emitted will contain transcriptions of the words the user is saying

Actual Behavior: the data event is emitted, but with empty results

Steps to reproduce:

• Open the public speech-to-text demo for watson in Safari 12.0
• Press the record with microphone button
• Speak, and observe no transcript in the result box

[germanattanasio]

Thanks a lot for filing this issue! Would you like to write a PR for this? I'd be more than happy to walk you through the steps involved.

[germanattanasio]

Tested with the latest version of the SDK, and it's working.

I think @nevrologica is right, and we need to make sure that accessing media stream happens after the user fires a click event.