fix: Fix title color type in settings drawer

[brianacnguyen]

Description

• Through the replacement work PR where I updated the UI of the settings drawer, I mistakenly updated the type of the title color from PropTypes.string to TextColor, which causes a warning. This PR reverts the type back from TextColor to PropTypes.string

Related issues

Fixes: https://github.com/MetaMask/metamask-mobile/pull/8037/files#r1471909876

Manual testing steps

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Screenshots/Recordings

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After

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• 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.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

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.

[github-actions]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6f84f18) 40.62% compared to head (fb06ce5) 40.62%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8476   +/-   ##
=======================================
  Coverage   40.62%   40.62%           
=======================================
  Files        1239     1239           
  Lines       29989    29989           
  Branches     2870     2870           
=======================================
  Hits        12182    12182           
  Misses      17109    17109           
  Partials      698      698           

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[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud