overlay: set device-specific fpsensor property
With no vendor.boot.fpsensor property set, vendor binaries always use FPC fpsensor, which leads to biometryd and unity system compositor crash on devices with goodix fpsensor.
With the vendor.boot.fpsensor property is set, vendor binaries choose fpc or gdx sensor correctly, so biometryd and unity system compositor do not crash on both gdx and fpc variants.