Summary: Download updated plugins in background. This is implemented by periodical polling of Marketplace GraphQL API (interval 5 min by default). The feature is under GK flipper_plugin_auto_update, so for now it is enabled only for me.
Reviewed By: mweststrate
Differential Revision: D21863057
fbshipit-source-id: 51d8223ad4b2a928f7571ea480c10ba2efd9935d
