Fix viewer screen recording

- Minimized <video> element would still intercept pointer events
- Original area occupied by ViewerScreenRecording component would always intercept
  pointer events, even after dragging the element somewhere else.

Test: npm run build:all && npm run test:all
Fix: b/238090772
Change-Id: I1dee45bada91e61c0a80495a9ec8ce16c73cbba7
3 files changed