Description

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: https://github.com/MetaMask/mobile-planning/issues/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

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). 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.