Blink initial page was solved by 5.4.0, but the initial page is not rendered on Android 6.0

## Environment

react native 0.63.4
Android 6.0.0 API 23
react-native-pager-view 5.4.0

## Description

I upgrade the package from 5.2.4 to 5.4.0, because of the blink initial page. It works well on my phone - Android 10.
But when I use my APP on the Android 6.0 device, the initial page is not rendered. After I scroll the page, the component works well.

## Reproducible Demo

I think normal usage could reproduce the problem

```javascript
function Demo(props) {
return {props.children}
}
```


从提供的 PagerView 演示开始，在 Android 6.0/API 23 上使用 react-native-pager-view 5.4.0，然后将其初始渲染与 Android 10 以及较早的 5.2.4 版本进行比较。初始页面无需滚动即可渲染即表示完成；该 issue 未指出需要检查的源文件或测试。

由索引模型根据 Issue 内容生成。