Bridge is a low level service that processes requests and responses to/from Bridge API.
This change is needed so that we can remove dependency on MailPoet\Util\License\Features\Subscribers
service from the Bridge. The dependecy is a higher level service and may easily cause a circular dependency issue.
The SettingsChangeHandler is service for handling side effects
when saving settings. This feels as a better place to put the functionality.
[MAILPOET-5191]
