Moved QR code scan and registration fragment to submission package (#21)

...ava/de/rki/coronawarnapp/ui/submission/ApiRequestState.kt

...ain/java/de/rki/coronawarnapp/ui/submission/ScanStatus.kt

...ronawarnapp/ui/submission/SubmissionDispatcherFragment.kt

...ronawarnapp/ui/submission/SubmissionQRCodeScanFragment.kt

...warnapp/ui/submission/SubmissionRegisterDeviceFragment.kt

.../rki/coronawarnapp/ui/submission/SubmissionTanFragment.kt

.../de/rki/coronawarnapp/ui/viewmodel/SubmissionViewModel.kt

...coronawarnapp/util/formatter/FormatterSubmissionHelper.kt

...pp/src/main/res/layout/fragment_submission_dispatcher.xml

...res/layout/fragment_submission_positive_other_warning.xml

.../src/main/res/layout/fragment_submission_qr_code_scan.xml

...c/main/res/layout/fragment_submission_register_device.xml

Corona-Warn-App/src/main/res/navigation/nav_graph.xml

Corona-Warn-App/src/main/res/values/dimens.xml

Corona-Warn-App/src/main/res/values/strings.xml