TextInput autoFocus

Hey!

First of all, I'd like to thank you for sharing this component, it's very useful!

So, I'm using the `HideWithKeyboard`, and most of my screens have a `TextInput` with `autoFocus` set to `true`, so it opens the keyboard right when the screens are opened.

I've been noticing some inconsistency with this, sometimes my content that should be hidden is actually hidden, but sometimes it still shows up. If I close the keyboard and open it again by clicking on the `TextInput` it always works. It seems to be something with `autoFocus`.

I've been only testing with Android, so I don't know if the same happens with iOS devices.

```
Versions
react-native-hide-with-keyboard: 1.1.1
react-native-cli: 2.0.1
react-native: 0.55.1
```

Thanks!

Reproduce the issue on Android using HideWithKeyboard with a TextInput whose autoFocus is true, using the versions reported in the issue. Compare the initial keyboard opening with reopening it by tapping the input; done means content that should be hidden is consistently hidden when the screen opens.

Written by the indexing model from the issue text.