Summary:
Fixes#17989
Previously, `ImagePickerIOS.openCameraDialog` would not render a `Video` option when the camera screen opened. If you passed `ImagePickerIOS.openCameraDialog({ videoMode: true }, ...)` the app would crash with an error complaining about the proper mediaType(s) not being set (see issue: #17989 for full details).
This is a 2 line change that sets the mediaTypes properly, so now users can capture videos in addition to photos.
Pull Request resolved: https://github.com/facebook/react-native/pull/19170
Differential Revision: D14068078
Pulled By: hramos
fbshipit-source-id: d04a3d267ca83ea58e88c880a85ac34ddd4744c8