Merges recent fixes from 1.7.x into 1.8.x (DEV) (#1744)

* Extract native libs set to true for both builds (DEV) (#1689)

* Fix sporadic worker crash on older android versions (EXPOSUREAPP-3987) (#1727)

* Fix notification issues by introducing IDs (EXPOSUREAPP-3971) (#1732)

* Reduce redundant code in notifications and introduce notification IDs

* Clean up unused constants

* Cancel risk score level notification once new test result is available

* Add more logging

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

* Versionbump for 1.7.1/RC1 (DEV) (#1733)

Co-authored-by: Katharina Seiz <Katharina.Seiz@sap.com>
Co-authored-by: AlexanderAlferov <64849422+AlexanderAlferov@users.noreply.github.com>
Co-authored-by: Matthias Urhahn <matthias.urhahn@sap.com>
Co-authored-by: Ralf Gehrer <ralfgehrer@users.noreply.github.com>
Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>