Test Menu options for Country selection and Measurement (EXPOSUREAPP-2229) (#1086)

* Implement country filter (#2229)

* Implement measure for Risk calculation and Key Retrieval (#2229)

* Some code cleanup for measureRiskLevelAndKeyRetrieval

* Some code cleanup (#2229)

* Implement usage of AppConfig usage for country codes (#2229)

* change CURRENT_COUNTRY val to var

* Suppress "LongMethod" warning (#2229)

* Adjust unit tests to respect new country filter

* Align with backend for app config country property name

* Display total file size of keys in results (#2229)

* Fix linting issue

* Update strings.xml files

* Do refactoring and some code clean up

* Move RiskLevel and Key retrieval measurement in own class

* Move code in logical classes. Remove translation in test fragment

* Fix linting and Unit tests

* Remove 3hour boolean check from debug class.

* Refactor CountryWrapper and missing dates check.

* Fix linting and Unit tests

* Add Unit test for getMissingDates

* Code cleanup

* Hide keyboard on action

* Extend statistics for api submission

* Set callback to null after invoked

Co-authored-by: Mert Safter <mert.safter@sap.com>
Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>