Merge changes from topics "b194781951-flags", "b194781951-flags-5", "b194781951-flags-6", "b194781951-flags-7" into sc-v2-dev

* changes:
  Remove PluginInitializer.
  Remove #handleWtfs from PluginInitializer.
  Remove #getPrivilegedPlugins from PluginInitializer.
  Rename PluginInstanceManager to PluginActionManager.