Upgrade @metamask/preferences-controller to version 19.0.0

A new major version of `@metamask/preferences-controller`, 19.0.0, is now available. This issue has been assigned to you and your team because you code-own this package in the `core` repo. If this package is present in this project, please prioritize upgrading it soon to unblock new features and bugfixes.

Search the repository's dependency manifests for @metamask/preferences-controller and confirm whether the package is present. Review the current version and any relevant package scripts or tests before updating it to 19.0.0; done means the dependency is upgraded and the affected checks pass.

Written by the indexing model from the issue text.