Does this stop call introduce any flickering or interruption in the video preview stream?

I ran two types of tests described below:

Test1: In change-video-input with 2 webcams connected, change fast the input device two times(before the webstream starts to get streamed).
Test2: Call getDevice() multiple times( I called this from the browser console
   eg: `player.record().getDevice(); player.record().getDevice()`

For both tests flickering is observed but in both pre-pull request and post-pull request versions. But I don't think there is any extra flickering induced by this change.

More exactly for Test1 if you select very fast camera2 & then camera1 => camera2 will be seen for a fraction of a second, then background color, then camera1. (But as stated above the behavior, in terms of flickering, is the same regardless of this pull-request)

I didn't observe any visual difference between the two code versions, only the fact the camera is released(with the pull-request).