[native] Fix Text -> TextInput alignment on iOS

Summary: In a couple of places in our app we convert a Text to a TextInput. I noticed while testing with an iOS device that the alignment was slightly off. This diff makes the transition perfectly seamless.

Test Plan: Visual inspection on a physical iOS device

Reviewers: atul

Subscribers: KatPo, palys-swm, Adrian

Differential Revision: https://phabricator.ashoat.com/D1093