Replace drupal_container() with Drupal::service() in the statistics module

drupal_container() is deprecated, and all calls in the statistics module need to be replaced with Drupal::service(), except for where the module_handler service is requested, which needs to be replaced with Drupal::moduleHandler() (see #1957154)

This task a part of #2001206: [META] Replace drupal_container() with Drupal::service() in core modules