Rapid Test - QR-Code from Schnelltestprofile cannot be scanned by PoC if...

Rapid Test - QR-Code from Schnelltestprofile cannot be scanned by PoC if fields contain Umlauts (EXPOSUREAPP-7016) (#3065)

* Added Character Set encoding hint to QrCodeGenerator

* Fixed QrCodeGenerator on api levels that return "java.nio.charset.CharsetICU[UTF-8]" instead of "UTF-8" for Charset.UTF-8.toString()
we now call .name() instead

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