Clean-up unnecessary getters for state properties

### What is this about?

The PreferencesController has unnecessary getters which could also be accessed from state property of the controller. For example `getUseRequestQueue() `, which could also be accessed as state.useRequestQueue. We need to remove all the getters/state properties duplication. And also not to entertain setters where messaging can be used to update the state.

### Scenario

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### Design

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### Technical Details

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### Threat Modeling Framework

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### Acceptance Criteria

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### 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

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Start by locating PreferencesController and the getUseRequestQueue() getter, then inventory the other duplicated state getters and setters. Confirm each property can be read from controller state or updated through messaging, remove the redundant accessors, and verify the controller no longer exposes duplicated state APIs.

Written by the indexing model from the issue text.