Replace SharedPreferences by DataStore

[ghusta]

See:

• https://developer.android.com/topic/libraries/architecture/datastore
• https://developer.android.com/training/data-storage/shared-preferences
• Android storage use cases and best practices
  • Handle App-specific Files

Legacy:

• https://developer.android.com/develop/ui/views/components/settings/

[ghusta]

Needs:

• Come to the Dark Side : we have Kotlin! 🍪 #55