VR does not work in packaged game with HTC Vive

VR is no longer rendering to the HTC Vive. Stereo on console command and -VR launch parameter do not render to the Vive in a packaged project

1. Have SteamVR running and an HTC Vive connected
2. Open UE4Editor.exe QAGame
3. Under File>Package, set for Development
4. File>Package>Win64
5. Once the project has packaged, open it
6. When the project opens, bring up the console and enter "Stereo On"

Expected Result: The game renders to the HTC Vive in VR

Outcome: No result.

Fix UE-51650

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