[Android] Stop nested scroll when the root starts intercepting (#4592)

## Description

When a gesture activates during a pull-to-refresh on an RN `FlatList`
with an RN `RefreshControl`, the spinner parks half-pulled and
`onRefresh` fires only on the next touch. Reported with
`ReanimatedSwipeable` rows in #4563.

RN drives the pull through nested scrolling and `SwipeRefreshLayout`
finishes it only in `onStopNestedScroll`, which Android triggers from
`View.dispatchTouchEvent` by calling `stopNestedScroll()` after the
final UP or CANCEL. When the root view starts intercepting,
`cancelTouchesInInterceptedViews` feeds `ACTION_CANCEL` straight to
`onTouchEvent`, so that cleanup never runs. Same omission #4492 fixed on
the `NativeViewGestureHandler` path.

The sweep now calls `stopNestedScroll()` after `onTouchEvent`, as
[`View.dispatchTouchEvent`
does](https://cs.android.com/android/platform/superproject/main/+/main:frameworks/base/core/java/android/view/View.java;l=16587).
It is a no-op without an open nested scroll. An interrupted pull now
snaps back, or fires `onRefresh` if it was past the threshold.

## Test plan

- Before #4582 (main at 993bbe7): RN `FlatList` + RN `RefreshControl`
with `ReanimatedSwipeable` rows and with bare v3 pan rows, drag a row
down then sideways. Short pull snaps back and the row still swipes, long
pull fires `onRefresh` immediately. Previously the spinner parked until
the next touch.
- On current main: single-finger drag leaves the pull to the scroll view
(gesture cancelled by #4582). Hold a pull with one finger and swipe
another row with a second finger: spinner snaps back or refreshes at
once instead of parking.
- GH `FlatList` + RN `RefreshControl`, GH `FlatList` + GH
`RefreshControl`, plain pulls and plain row swipes unchanged. iOS
unaffected.

<details>
<summary>Repro</summary>

```tsx
import { useCallback, useState } from 'react';
import { FlatList, RefreshControl, StyleSheet, Text, View } from 'react-native';
import { GestureDetector, GestureHandlerRootView, usePanGesture } from 'react-native-gesture-handler';

const DATA = Array.from({ length: 30 }, (_, i) => `Row ${i}`);

function Row({ item }: { item: string }) {
  const pan = usePanGesture({ activeOffsetX: [-10, 10] });
  return (
    <GestureDetector gesture={pan}>
      <View style={styles.row}>
        <Text>{item}</Text>
      </View>
    </GestureDetector>
  );
}

export default function App() {
  const [refreshing, setRefreshing] = useState(false);
  const onRefresh = useCallback(() => {
    setRefreshing(true);
    setTimeout(() => setRefreshing(false), 1000);
  }, []);

  return (
    <GestureHandlerRootView style={styles.container}>
      <FlatList
        data={DATA}
        keyExtractor={(item) => item}
        refreshControl={<RefreshControl refreshing={refreshing} onRefresh={onRefresh} />}
        renderItem={({ item }) => <Row item={item} />}
      />
    </GestureHandlerRootView>
  );
}

const styles = StyleSheet.create({
  container: { flex: 1 },
  row: { padding: 20, backgroundColor: 'white', borderBottomWidth: 1, borderColor: '#eee' },
});
```

<details>

Author: m-bert

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/core/GestureHandlerOrchestrator.kt

@@ -774,6 +774,7 @@ class GestureHandlerOrchestrator(
         continue
       }
       view.onTouchEvent(cancelEvent)
+      view.stopNestedScroll()
     }
 
     cancelEvent.recycle()