Fix android_ripple not working with foreground: false in RN 0.82.1 (#54455)

Summary:
Fixes facebook/react-native#54372 #54298

The `android_ripple` prop on `Pressable` components stopped working in React Native 0.82.1 when `foreground: false` (the default value). This regression was introduced by the new background drawable system.

**Root Cause:** The `setFeedbackUnderlay` method in `BackgroundStyleApplicator.kt` was creating a new `CompositeBackgroundDrawable` with the ripple effect but not assigning it back to the view's background, causing the ripple to be invisible.

**Solution:** Modified the method to properly assign the new composite drawable containing the ripple effect to `view.background`.

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[ANDROID] [FIXED] - Fix android_ripple not working with foreground: false in Pressable components

Pull Request resolved: facebook/react-native#54455

Test Plan:
**Before the fix:** Create a Pressable with android_ripple and foreground: false (default) - no ripple effect appears when pressed.

**After the fix:** The ripple effect works correctly.

Test case:
```jsx
<Pressable
  android_ripple={{ color: 'red', borderless: false }}
  onPress={() => console.log('Pressed!')}
>
  <Text>Press Me</Text>
</Pressable>

Reviewed By: jorge-cab

Differential Revision: D86671603

Pulled By: joevilches

fbshipit-source-id: 71cef114e903a9f807a52a9f3902b85d44bf58b3

Author: ish1416

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/BackgroundStyleApplicator.kt

@@ -467,7 +467,7 @@ public object BackgroundStyleApplicator {
    */
   @JvmStatic
   public fun setFeedbackUnderlay(view: View, drawable: Drawable?) {
-    ensureCompositeBackgroundDrawable(view).withNewFeedbackUnderlay(drawable)
+    view.background = ensureCompositeBackgroundDrawable(view).withNewFeedbackUnderlay(drawable)
   }
 
   /**