* For #220
- Added advanced header + locale settings item in the settings fragment

* For #220
- Added locale selection page with lib state + handling of locale changes

* For #220
- Removed registering for locale changes in the manifest, allow system
to restart activity in that scenario

* For #220
- Added unit tests for locale settings page

* For #220: fixed an outdated unit test
ga-a

Co-authored-by: Severin Rudie <Baron-Severin@users.noreply.github.com>