* Add sample for using tabCapture in offscreen document.
* Add recording item to tabCapture demo.
Adds an icon which indicates if recording is currently in
progress.
* Addressed a number of pieces of feedback.
* Apply suggestions from code review
Co-authored-by: amysteamdev <37001393+AmySteam@users.noreply.github.com>
* Add step to pin extension.
* Add comments.
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Co-authored-by: amysteamdev <37001393+AmySteam@users.noreply.github.com>
