图形设备供应商的标识符代码（只读）。
此为用户显卡的 PCI 供应商 ID。该编号用于唯一标识特定的显卡制造商。
该编号在所有操作系统和驱动程序版本中都相同。
Note that device IDs are only implemented on PC (Windows/Mac/Linux) platforms and Android when running Vulkan; on other
platforms you'll have to do name-based detection if needed.
See pci-ids.ucw.cz for a list of vendor IDs.
另请参阅：SystemInfo.graphicsDeviceID、SystemInfo.graphicsDeviceVendor。