AccountsController upgrade from v14 to v18

[desi]

What is this about?

The AccountsController is behind by four major versions and needs to be updated. Upgrade from v14 to v18.

Because this controller is pretty far behind we expect it will have a number of breaking changes that will need to be dealt with so we haven't combined this with any other controller upgrades.

Scenario

n/a

Design

n/a

Technical Details

n/a

Threat Modeling Framework

n/a

Acceptance Criteria

• AccountsController is on v18

Stakeholder review needed before the work gets merged

• [X] Engineering (needed in most cases)
• [ ] Design
• [ ] Product
• [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
• [ ] Security
• [ ] Legal
• [ ] Marketing
• [ ] Management (please specify)
• [ ] Other (please specify)

References

No response

[owencraston]

The accounts controller was already updated to version 18.1.0 in this PR by @k-g-j: https://github.com/MetaMask/metamask-mobile/pull/10821. An upgrade to version 18.2.0 would be nice though.