Upgrade @metamask/account-tree-controller to version 1.0.0

A new major version of `@metamask/account-tree-controller`, 1.0.0, 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.

Locate the dependency manifest and references to @metamask/account-tree-controller in the repository, then review the package's 1.0.0 migration requirements. Upgrade the dependency if it is used here, adapt any affected references, and run the relevant project checks to confirm the extension builds and tests pass.

Written by the indexing model from the issue text.