Moving dvt initialization to main thread
Moving dvt initialization to main thread

Summary:
This is to fix the install command for devices.
There is an assertion that was hit in the dvt device
initialization if it was not run in the main thread.

Reviewed By: migchez

Differential Revision: D3876595

fbshipit-source-id: b1d8adda76e84742bb92b9c4f7897dd27facacb8

StevenUpForever/FBSimulatorControl,bootstraponline/FBSimulatorControl,facebook/FBSimulatorControl,bootstraponline/FBSimulatorControl,facebook/FBSimulatorControl,StevenUpForever/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,bootstraponline/FBSimulatorControl,plu/FBSimulatorControl,bootstraponline/FBSimulatorControl,ichu501/FBSimulatorControl,StevenUpForever/FBSimulatorControl,plu/FBSimulatorControl,facebook/FBSimulatorControl,plu/FBSimulatorControl,StevenUpForever/FBSimulatorControl,plu/FBSimulatorControl