* Reworked Notification service to remove Nullpointer crashes due to non-final static variables being null. Instead moved all state to Worker specific architecture. Also switched to Android based localization because core-based one can be unavailable to worker.
* Added missing blanks
* Added more internationalization
Added missing androidX declaration (neccessary for newer Gradle versions)
Updated Gradle for new Android Studio Version
* Optimization
* Removed missing translations error
Units with no turns left are now grayed out
Added culture pool to cities and tiles being added to cities when pool fills
Changed tile icon order and placing of resource icon
