update camera request permission flow (#382)

* update camera request permission flow
- go back to dispatcher if denied
- directly request permission without rational dialog in between

* - show dialog when camera permission is denied permanently

* removed en/de strings

* removed testing code

* removed de strings

Co-authored-by: Jakob Möller <jakob.moeller@sap.com>
Co-authored-by: Luka Harambasic <luka.harambasic@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>