Summary: While building some views with YogaKit, I found an interesting problem. If you are apply `yg_` properties to a view which is constructed of subclassed views (that don't use Yoga.) we still treat view (and it's subviews) like they are using YogaKit. This fixes that behavior. Reviewed By: emilsjolander Differential Revision: D4348344 fbshipit-source-id: 37b8648918529f55afea1d1883a03af398aac849