Information on how to scan QR Code (EXPOSUREAPP-2581) (#1326)

* QR info screen changes, but with 1.6 as base

* Review changes, tests still to come

* Test implementation for new view model

* Removed unneccessary binding and viewmodel in view

* Now injecting view model

* lowercase fix

* removed unused imports

* removed blank line

Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>
Co-authored-by: Ralf Gehrer <ralfgehrer@users.noreply.github.com>