Upgrade @metamask/transaction-pay-controller to version 12.0.0

A new major version of `@metamask/transaction-pay-controller`, 12.0.0, 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.

Start by locating the project manifest and lockfile entries for @metamask/transaction-pay-controller, then review the current dependency and its package usage. Update the dependency to version 12.0.0 and run the repository's relevant checks to confirm the mobile project still builds and tests pass.

Written by the indexing model from the issue text.