Merge pull request #850 from corona-warn-app/dev

Corona-Warn-App/build.gradle

...orTesters/java/de.rki.coronawarnapp/TestForAPIFragment.kt

...c/deviceForTesters/res/layout/fragment_test_for_a_p_i.xml

.../src/main/java/de/rki/coronawarnapp/risk/TimeVariables.kt

.../rki/coronawarnapp/storage/keycache/KeyCacheRepository.kt

...ava/de/rki/coronawarnapp/ui/viewmodel/TracingViewModel.kt

...ain/java/de/rki/coronawarnapp/util/CachedKeyFileHolder.kt

...e/rki/coronawarnapp/util/formatter/FormatterRiskHelper.kt

...i/coronawarnapp/util/formatter/FormatterSettingsHelper.kt

...oronawarnapp/worker/DiagnosisKeyRetrievalOneTimeWorker.kt

Corona-Warn-App/src/main/res/layout/fragment_main.xml

Corona-Warn-App/src/main/res/layout/include_risk_card.xml

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

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

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

...java/de/rki/coronawarnapp/util/CachedKeyFileHolderTest.kt

...i/coronawarnapp/util/formatter/FormatterRiskHelperTest.kt

...ronawarnapp/util/formatter/FormatterSettingsHelperTest.kt

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