IPlatformInputDeviceMapper::ShouldCreateUniqueUserForEachDevice

If true, then when we remap the platform's raw int32 ControllerId to its [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) and owning [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) we should create a new platform user id if this controller id is not already mapped.