chore(runway): cherry-pick fix: disable option to remove Solana account (#15865)

- fix: disable option to remove Solana account (#15760)

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## **Description**

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Write a short description of the changes included in this pull request,
also include relevant motivation and context. Have in mind the following
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1. What is the reason for the change?
2. What is the improvement/solution?
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Removes the option to remove Solana snap accounts on the UI

## **Related issues**

Fixes: #15616

## **Manual testing steps**

1. Add an account via private key
2. Long press the account until you see the option to remove it
3. Add a Solana account
4. Long press the account
5. The option to remove should not be displayed

## **Screenshots/Recordings**

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before and after of your change. -->

### **Before**

Check #15616

### **After**

None

## **Pre-merge author checklist**

- [ ] 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).
- [ ] 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
- [ ] 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**

- [ ] 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.
[ef304e3](ef304e3)

Author: sethkfman