getPreferenceDataStore
Returns PreferenceDataStore used by this preference. Returns null
if SharedPreferences is used instead.
By default preferences always use SharedPreferences. To make this preference to use the PreferenceDataStore you need to assign your implementation to the preference itself via setPreferenceDataStore or to its PreferenceManager via setPreferenceDataStore.
Return
The PreferenceDataStore used by this preference or null
if none