chore: Scope PortfolioView feature flag to iOS devices only

[gambinish]

Description

Scopes the PortfolioView feature flag to only be true for iOS devices, while we do more troubleshooting on the performance bottleneck on Android devices.

Related issues

Performance related bug ticket: #12679

Manual testing steps

1. Run app with feature flag: PORTFOLIO_VIEW='true' yarn watch:clean
2. On iOS device, PortfolioView should be enabled
3. On Android device, PortfolioView should not be enabled

Screenshots/Recordings

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile 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.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[github-actions]

Bitrise

❌❌❌ pr_smoke_e2e_pipeline failed on Bitrise! ❌❌❌

Commit hash: 961f73e
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/b5de7004-2fe7-4dae-a833-70536ac82218

Note

• You can kick off another pr_smoke_e2e_pipeline on Bitrise by removing and re-applying the Run Smoke E2E label on the pull request

Tip

• Check the documentation if you have any doubts on how to understand the failure on bitrise

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sethkfman]

LGTM