Homescreen Notifications, even though keys were submitted (EXPOSUREAPP-3181, EXPOSUREAPP-3182) (#1418)

* Added additional checks to notification of exposure/test-result to check for finished submission

Signed-off-by: Kolya Opahle <k.opahle@sap.com>

* Small changes to code style

Signed-off-by: Kolya Opahle <k.opahle@sap.com>

Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>