fix: AccountSelectorList test (#15085)

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## **Description**
This test was skipped during the [react native
upgrade](https://github.com/MetaMask/metamask-mobile/pull/13771/files#).
I have since fixed the test and removed the it.skip.

The fix for this was to remove the manual mock of React.useRef

## **Related issues**

Fixes:

## **Manual testing steps**

1. checkout this branch
2. run yarn setup
3. then run yarn jest
app/components/UI/AccountSelectorList/AccountSelectorList.test.tsx
4. all the tests should pass

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

<img width="766" alt="Screenshot 2025-05-02 at 11 45 08 AM"
src="https://github.com/user-attachments/assets/86f8274d-a817-4ab3-9ac8-108d0733b809"
/>



### **After**

<img width="767" alt="Screenshot 2025-05-02 at 11 44 41 AM"
src="https://github.com/user-attachments/assets/fc67e27b-83ab-4e4c-8f94-df822f8a186c"
/>


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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.

Author: owencraston

app/components/UI/AccountSelectorList/AccountSelectorList.test.tsx

@@ -923,18 +923,8 @@ describe('AccountSelectorList', () => {
   });
 
   // TODO: fix this test
-  it.skip('should not auto-scroll when isAutoScrollEnabled is false', async () => {
-    // Create a mock FlatList ref with scrollToOffset method
+  it('should not auto-scroll when isAutoScrollEnabled is false', async () => {
     const mockScrollToOffset = jest.fn();
-    const mockFlatListRef = {
-      current: {
-        scrollToOffset: mockScrollToOffset,
-      },
-    };
-
-    // Override React.useRef to return our mock reference
-    const originalUseRef = React.useRef;
-    jest.spyOn(React, 'useRef').mockImplementation(() => mockFlatListRef);
 
     // Create test component with auto-scroll disabled
     const AccountSelectorListNoAutoScrollTest: React.FC = () => {
@@ -960,9 +950,6 @@ describe('AccountSelectorList', () => {
 
     // Verify that scrollToOffset was not called
     expect(mockScrollToOffset).not.toHaveBeenCalled();
-
-    // Restore the original useRef implementation
-    React.useRef = originalUseRef;
   });
 
   it('should display ENS name instead of account name when available', async () => {