* For #8565: Create custom SharedPreferenceUpdater for String Preferences
* For #8565: Use custom updater to correctly update DropDownPreference
* For #8565: Set default values for dropDown preferences
* For 8565: add tests for findEntriesValue
* For 8565: clarified findEntryValue
Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>