Checklist for adding an end-of-life (eol) apps:
- move old class from de.marmaro.krt.ffupdater.app.impl to de.marmaro.krt.ffupdater.app.eol
- change base class to EolBaseApp
- add entry in de.marmaro.krt.ffupdater.eol.EolApp
- remove entry from arrays backgroundupdate_checkexcluded_appsentries +
backgroundupdate_checkexcluded_appsvalues in src/main/res/values/arrays.xml
- add comment to the entry in AndroidManifest.xml
- update README.md
- update fastlane/metadata/android/en-US/{full_description.txt,short_description.txt}
- update description in repomaker
- remove old unit tests + test resources