Fix companion pruning
Fix companion pruning

Summary: We were failing to handle the exception appropriately if a client for an existing companion is built, but that is no longer responsive.

Reviewed By: c-ryan747

Differential Revision: D24619746

fbshipit-source-id: f29151273c57ed539bcc4644342f251299a0e052

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl