add empty object as constraints parameter for restart method

[olipyskoty]

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Pull Request Details

JIRA link(s):

• N/A

Description

This PR addresses a follow-up bug to GitHub issue #462. In Firefox, when a user is connected to a room and uses an external microphone (or headphones with a built-in microphone), and then disconnects that mic, the other participants can no longer hear the user despite being unmuted. We fixed this by passing an empty object {} to audioTrack.restart() in the useRestartAudioTrackOnDeviceChange hook, which will use the default MediaTrackConstraints as a result.

Burndown

Before review

• Updated CHANGELOG.md if necessary
• Added unit tests if necessary
• Updated affected documentation
• Verified locally with npm test
• Manually sanity tested running locally
• Included screenshot as PR comment (if needed)
• Ready for review

Before merge

• Got one or more +1s
• Re-tested if necessary

[timmydoza]

Great description!