Summary:
`contentSize` was removed from both iOS and Android, tests was updated.
USE `onContentSizeChange` INSTEAD.
Why?
* It always was a hack;
* We already have dedicated event for it: `onContentSizeChange`;
* `onChange` has nothing to do with layout actually;
* We have to maintain `onChange` handler as fast and simple as possible, this feature complicates it a lot;
* It was undocumented feature;
* We already have native auto-expandable <TextInput>, so it illuminates 99% current use cases of this feature.
Reviewed By: mmmulani
Differential Revision: D4989881
fbshipit-source-id: 674bb98c89ada1fca7b3b20b304736b2a3b8304e
bac84ce207