Merge branch 'release/1.4.x' into fix/pull_14X_into_15X

# Conflicts:
#	Corona-Warn-App/src/device/java/de/rki/coronawarnapp/ui/main/MainFragment.kt
#	Corona-Warn-App/src/deviceForTesters/java/de/rki/coronawarnapp/ui/main/MainFragment.kt
#	Corona-Warn-App/src/main/java/de/rki/coronawarnapp/ui/riskdetails/RiskDetailsFragment.kt
#	Corona-Warn-App/src/main/res/values-de/strings.xml
#	Corona-Warn-App/src/main/res/values-pl/strings.xml
#	Corona-Warn-App/src/main/res/values/strings.xml
#	Corona-Warn-App/src/test/java/testhelpers/preferences/MockSharedPreferences.kt