fix: fix metrics trackEvent compatibility with legacy events

[NicolasMassart]

Description

Add handling of legacy events that have properties inside the event

Related issues

Realted to https://github.com/MetaMask/mobile-planning/issues/1129

Manual testing steps

NA - see unit tests

Screenshots/Recordings

Before

NA

After

NA

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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[tommasini]

LGTM!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e572035) 41.48% compared to head (10cc761) 41.53%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8678      +/-   ##
==========================================
+ Coverage   41.48%   41.53%   +0.04%     
==========================================
  Files        1256     1260       +4     
  Lines       30581    30615      +34     
  Branches     3002     3005       +3     
==========================================
+ Hits        12687    12716      +29     
- Misses      17141    17145       +4     
- Partials      753      754       +1     

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[tommasini]

LGTM

[tommasini]

LGTM!

[sonarcloud]

Quality Gate passed

Issues
0 New issues

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

See analysis details on SonarCloud