Fix setLayoutAnimationEnabled assigning variable to itself (#56387)

Summary:
`setLayoutAnimationEnabled()` in `LayoutAnimation.js` assigns `isLayoutAnimationEnabled` back to itself instead of the `value` parameter:

```js
// Before (bug)
function setLayoutAnimationEnabled(value: boolean) {
  isLayoutAnimationEnabled = isLayoutAnimationEnabled; // no-op
}

// After (fixed)
function setLayoutAnimationEnabled(value: boolean) {
  isLayoutAnimationEnabled = value;
}
```

This makes the function a complete no-op, meaning LayoutAnimation can never be toggled at runtime once initialized from the feature flag.

## Changelog:

[GENERAL] [FIXED] - Fix setLayoutAnimationEnabled not applying the value parameter

Pull Request resolved: #56387

Test Plan:
1. Call `LayoutAnimation.setLayoutAnimationEnabled(false)` and verify layout animations are disabled
2. Call `LayoutAnimation.setLayoutAnimationEnabled(true)` and verify they re-enable
3. Previously both calls had no effect due to the self-assignment bug

Reviewed By: Abbondanzo

Differential Revision: D122803610

Pulled By: cortinico

fbshipit-source-id: 7ed2ab77b36ef61fa397778e048be70f2d0ca370

Author: Nedunchezhiyan-M

packages/react-native/Libraries/LayoutAnimation/LayoutAnimation.js

@@ -46,7 +46,7 @@ let isLayoutAnimationEnabled: boolean =
   ReactNativeFeatureFlags.isLayoutAnimationEnabled();
 
 function setLayoutAnimationEnabled(value: boolean) {
-  isLayoutAnimationEnabled = isLayoutAnimationEnabled;
+  isLayoutAnimationEnabled = value;
 }
 
 /**