Summary:
Issue reported by Titozzz , `TextInput` would shrink when we have attributes like `lineHeight`.
Demonstration can see GIF like below:
https://giphy.com/gifs/KGNs1qIMHF3DIk1EPK
I think the reason is we apply an empty attributed string to `UITextField`, now if the length is 0, we just nil the `attributedText` instead.
## Changelog
[iOS] [Fixed] - Don't apply empty attributed string for TextInput
Pull Request resolved: https://github.com/facebook/react-native/pull/25143
Differential Revision: D15661751
Pulled By: sammy-SC
fbshipit-source-id: 9770484a1b68a6409e63ea25ac9a6fd0d3589b14