fix: [Android] fixed index with null child (#251)

Co-authored-by: Oleksandr Pishchuk <[email protected]>

Author: olvipi

js/PickerAndroid.android.js

@@ -85,7 +85,7 @@ function PickerAndroid(props: PickerAndroidProps, ref: PickerRef): React.Node {
     // eslint-disable-next-line no-shadow
     let selected = 0;
     // eslint-disable-next-line no-shadow
-    const items = React.Children.map(props.children, (child, index) => {
+    const items = React.Children.toArray(props.children).map((child, index) => {
       if (child === null) {
         return null;
       }