getDirectoryPath method
Selects a directory and returns its absolute path.
On Android, this requires to be running on SDK 21 or above, else won't work.
Returns null
if folder path couldn't be resolved.
Note: Some Android paths are protected, hence can't be accessed and will return /
instead.
Implementation
Future<String?> getDirectoryPath() async =>
throw UnimplementedError('getDirectoryPath() has not been implemented.');