[ENG-9959](https://linear.app/comm/issue/ENG-9959/improve-scanning-qr-code-flow).
Navigates to screen implemented in previous diffs in the stack, right after the QR code is scanned.
Adds `useFocusEffect` because after swiping back to the camera user should be able to scan the QR again.
In [ENG-9968](https://linear.app/comm/issue/ENG-9968/final-testing-task) there is an example of how this flow looks like
Depends on D14115