fix: replaced incorrect export icon with correct icon (#10548)

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## **Description**
Replaced incorrect icon with correct icon raised from this
[issue](MetaMask/MetaMask-planning#2454) icon
assets pulled from
[Figma](https://www.figma.com/design/NI7m8KldyGDA1GanSY03fy/Latest-Mobile-IA%2FNAV-Redesign?node-id=7626-197338&t=JIV7V5PDvq8r0aI7-0)

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## **Related issues**

Fixes: N/A

## **Manual testing steps**

1. On main screen click on the more section in the address row and a
bottom sheet will appear
2. Check bottom sheet to make sure it is the new icon

## **Screenshots/Recordings**

| Before  | After  |
|:---:|:---:|

|![before_view_etherscan](https://github.com/user-attachments/assets/e8eb0f76-da87-471b-a52d-8c1b1f86801f)|![Screenshot
2024-08-12 at 1 05
39 PM](https://github.com/user-attachments/assets/79b75167-407d-46d0-b93f-181cb0793712)|

### **Before**
N/A

<!-- [screenshots/recordings] -->

### **After**
N/A
<!-- [screenshots/recordings] -->

## **Pre-merge author checklist**

- [x] I’ve followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
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
- [ ] I’ve included tests if applicable
- [ ] 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**

- [x] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [x] 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.