Inject the file_system service in the theme registry service

Problem/Motivation

Inject the file_system service in the theme registry service in (\Drupal\Core\Theme\Registry)

Steps to reproduce

Proposed resolution

Properly inject file_system service into constructor.

Remaining tasks

Make Code Changes.

User interface changes

NA

Introduced terminology

NA

API changes

Calling (\Drupal\Core\Theme\Registry) will require an instance of \Drupal::service('file_system') as an argument

Data model changes

Release notes snippet

Calling \Drupal\Core\Theme\Registry now require \Drupal::service('file_system') in their constructor.