Summary:
a275eac56e21b8f3631bcd03ace86c07a3b0c0ba removed TextInput.State but we should keep it as it was a public-ish API and we don't have any migration plan off it. Also bring back `focusTextInput` and `blurTextInput` with a deprecation warning.
Tested TextInput.State is back
[GENERAL][ENHANCEMENT][TextInput] - Bring back TextInput.State, deprecate focusTextInput and blurTextInput
Closes https://github.com/facebook/react-native/pull/18936
Differential Revision: D8044439
Pulled By: hramos
fbshipit-source-id: fde145f04bb1d46ef58b5954cb7963adf495b21c