fix: OverKeyboardView crash with a11y (#962)

## 📜 Description

Fixed a crash when `TalkBack` is enabled on Android and you use
`OverKeyboardView`.

## 💡 Motivation and Context

The problem comes from the fact that the system tries to traverse the
view hierarchy, but overlay views are not part of the main view
hierarchy.

`OverKeyboardHostView` **pretends** that the views you pass to it are
its own children. From the platform’s point of view those views **are
not really descendants** of `OverKeyboardHostView` — they live in a
completely different window created with `WindowManager.addView`.

When the Android accessibility framework walks the view-tree it calls
`addChildrenForAccessibility()`, iterates over `getChildAt(i)` and
finally calls:

```kt
offsetRectBetweenParentAndChild(parent, child);
```

That helper checks that child **is a true descendant** of parent, and if
it isn’t it throws the exception you see:

```kt
java.lang.IllegalArgumentException: parameter must be a descendant of this view
```

To solve this I decided to exclude `OverKeyboardHostView` from
accessibility traversal, so that inner views handles accessibility on
their own (this is how it should work).

Closes
#961

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
remove this platform/language -->

### Android

- don't add `OverKeyboardView` container to an accessibility;

## 🤔 How Has This Been Tested?

Tested manually in Fabric example on Pixel 7 Pro API 35.

## 📸 Screenshots (if appropriate):


https://github.com/user-attachments/assets/8e2eff6a-d0cc-4d8d-9e6a-1a7a5a2d8a28

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed

Author: kirillzyusko

android/src/main/java/com/reactnativekeyboardcontroller/views/overlay/OverKeyboardViewGroup.kt

@@ -6,6 +6,7 @@ import android.graphics.PixelFormat
 import android.view.MotionEvent
 import android.view.View
 import android.view.WindowManager
+import android.view.accessibility.AccessibilityEvent
 import com.facebook.react.bridge.UiThreadUtil
 import com.facebook.react.bridge.WritableMap
 import com.facebook.react.bridge.WritableNativeMap
@@ -84,6 +85,16 @@ class OverKeyboardHostView(
   }
   // endregion
 
+  // region Accessibility
+  override fun addChildrenForAccessibility(outChildren: ArrayList<View>) {
+    // Don’t let Android try to reach children that are not actual descendants
+  }
+
+  // Explicitly override this to prevent accessibility events being passed down to children
+  // Those will be handled by the `hostView` which lives in the `windowManager`
+  override fun dispatchPopulateAccessibilityEvent(event: AccessibilityEvent): Boolean = false
+  // endregion
+
   fun show() {
     val layoutParams =
       WindowManager.LayoutParams(