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## **Description**

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also include relevant motivation and context. Have in mind the following
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1. What is the reason for the change?
2. What is the improvement/solution?
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This PR goal is to add upcoming transaction simulations toggle to
security preferences.

Note: Toggle currently hidden behind a feature flag env which we aim to
remove this week and enable.
Patched part of the preferences controller already applied to main here
MetaMask/core#4283

## **Related issues**

Fixes: MetaMask/mobile-planning#1720

## **Manual testing steps**

1. Security settings, toggle off "Estimated balance changes"
2. Close app
3. Open app and see if it still toggled off (also validate opposite to
make sure `PreferencesController` updates accordingly)


## **Screenshots/Recordings**


https://github.com/MetaMask/metamask-mobile/assets/7644512/cc197830-3874-475c-95d4-a9d79884f7f7

## **Pre-merge author checklist**

- [X] I’ve followed [MetaMask Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [X] I've completed the PR template to the best of my ability
- [X] I’ve included tests if applicable
- [X] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [X] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.