IHeadMountedDisplay::GetHMDWornState

Returns [EHMDWornState::Worn](API\Runtime\HeadMountedDisplay\EHMDWornState__Type) if we detect that the user is wearing the HMD, [EHMDWornState::NotWorn](API\Runtime\HeadMountedDisplay\EHMDWornState__Type) if we detect the user is not wearing the HMD, and [EHMDWornState::Unknown](API\Runtime\HeadMountedDisplay\EHMDWornState__Type) if we cannot detect the state.