PlayerSettings.SetPropertyString not working

I'm trying to put together an editor script to automatically build to a VR device. In Unity 5.4, heterogeneous support was added for multiple VR SDKs, so setting PlayerSettings.virtualRealitySupported = true is no longer enough to prepare a VR-ready build - the specific supported SDKs need to be selected.

From looking through the PlayerSettings API, I stumbled across the deprecated property PlayerSettings.stereoscopic3D, which had the following [Obsolete] message:

"Use SetPropertyString("VR::devices", "stereo") instead"​

This gave me hope that this property string might define the list of supported VR SDKs. I tried calling this method, but was thrown the following error message:

"EditorOnlyPlayerSettings property VR::devices::VR::devices not inititalized." [sic]​

I had the same issue when trying to read the value with GetPropertyString. When calling the method with a specific build target, i.e. Android, I got the following error message:

"EditorOnlyPlayerSettings property Android::VR::devices not inititalized."​

I suspect that there is an issue in the PlayerSettings SetPropertyString and GetPropertyString methods, where settings that apply to all platforms (BuildTargetGroup.Unknown), are not having their key constructed properly - the input string is being concatenated with itself (VR::devices::VR::devices) instead of being left unmodified (VR::devices).

Can anybody at Unity confirm this issue? Is there a fix coming in the near future, possibly in the next Daydream Technical Preview?

 

No changes.
Trying to disable HW Statistics through API
PlayerSettings.SetPropertyBool("submitAnalytics", true, BuildTargetGroup.Unknown)
Throws error:
Unknown Property: 'submitAnalytics::submitAnalytics'
Furthermore: compiler outputs 'deprecated' warning. But no ability to set this setting through API.