restore DaysInRetentionPeriod in RiskDetails on resume. fixes #594 (#716)

Fix risk status not updating after reopening backgrounded app.

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

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/ui/riskdetails/RiskDetailsFragment.kt

@@ -61,6 +61,7 @@ class RiskDetailsFragment : Fragment() {
         tracingViewModel.refreshExposureSummary()
         tracingViewModel.refreshLastTimeDiagnosisKeysFetchedDate()
         TimerHelper.checkManualKeyRetrievalTimer()
+        tracingViewModel.refreshActiveTracingDaysInRetentionPeriod()
         binding.riskDetailsContainer.sendAccessibilityEvent(AccessibilityEvent.TYPE_ANNOUNCEMENT)
     }