Verify important QR code attributes on scan (EXPOSUREAPP-6378, EXPOSUREAPP-6399) (#2816)

* Implemented TraceLocationVerifier that checks scanned qr codes for required conditions
Also added some error strings to support information propagation to the user (took them from ios could not find a design)

* Fixed CheckInsViewModelTest

* Added Additional checks to TraceLocationVerifier (EXPOSUREAPP-6399)

* Fixed linting issues

* Fixed linting issues caused by fixing linting issues

* Fixed linting issues caused by auto formatting the fixed lint issues

* Implemented first set of unit tests and changed the start end time condition to allow start and end to equal
Changed AlertDialog Builder to MaterialAltertDialogBuilder

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>