Summary:
*Stack summary*: this stack adds ability to manage device plugins in the same way as client plugins: install, update, uninstall, enable (star) and disable (unstar) them.
*Diff summary*: implemented all plugin management actions for device plugins.
Changelog: it is now possible to enable/disable and install/uninstall device plugins
Reviewed By: mweststrate
Differential Revision: D26337377
fbshipit-source-id: 7d1ed61a8dc5f3339e5e548c613b67bca0c27f4f
4541cdc23b