Fix docs to suggest static creation of ViewCreator
Fix docs to suggest static creation of ViewCreator

Summary: Creation of `ViewCreator` instance doesn't depend on model, therefore it should be created statically instead of creating new instance on every RenderEvent. Fixing doc to suggest that approach.

Reviewed By: passy

Differential Revision: D7151251

fbshipit-source-id: e479c5c3e0165d15bd985933302f150131a1ee5d

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho