[composable-controller] Fix validator types

[MajorLift]

Explanation

References

• Closes https://github.com/MetaMask/core/issues/4448
• Closes https://github.com/MetaMask/core/issues/4444
• Fixes https://github.com/MetaMask/metamask-mobile/issues/10073
  • See https://github.com/MetaMask/metamask-mobile/pull/10011

Changelog

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've highlighted breaking changes using the "BREAKING" category above as appropriate