Merge pull request #1100 from corona-warn-app/feature/interoperability-country-screen

...arn-App/src/deviceForTesters/res/navigation/nav_graph.xml

...a/de/rki/coronawarnapp/ui/submission/SubmissionCountry.kt

...i/submission/adapter/SubmissionCountrySelectionAdapter.kt

...rnapp/ui/submission/fragment/SubmissionContactFragment.kt

...submission/fragment/SubmissionCountrySelectionFragment.kt

...pp/ui/submission/fragment/SubmissionDispatcherFragment.kt

...awarnapp/ui/submission/fragment/SubmissionDoneFragment.kt

...warnapp/ui/submission/fragment/SubmissionIntroFragment.kt

...pp/ui/submission/fragment/SubmissionQRCodeScanFragment.kt

.../fragment/SubmissionResultPositiveOtherWarningFragment.kt

...nawarnapp/ui/submission/fragment/SubmissionTanFragment.kt

...pp/ui/submission/fragment/SubmissionTestResultFragment.kt

.../submission/viewmodel/SubmissionCountrySelectViewModel.kt

...warnapp/ui/submission/viewmodel/SubmissionTanViewModel.kt

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

.../main/res/drawable/ic_submission_country_flag_austria.xml

...rc/main/res/drawable/ic_submission_country_flag_czech.xml

.../main/res/drawable/ic_submission_country_flag_denmark.xml

.../main/res/drawable/ic_submission_country_flag_estonia.xml

.../main/res/drawable/ic_submission_country_flag_ireland.xml