Add AOSP support for Lynx

We will have a 'vendor' project containing proprietary blobs
to be able to build and flash Pixel device when vendor source is not
available.
The project name is
platform/vendor/aosp/google_devices/lynx

and the path is
vendor/google_devices/lynx

TEST:make

BUG: 240203789
Change-Id: I33af4dce2b60f5de21d8998e445d2f8abd2b7e01

device-lynx.mk

@@ -21,6 +21,7 @@ $(call inherit-product-if-exists, vendor/google_devices/lynx/prebuilts/device-ve
 $(call inherit-product-if-exists, vendor/google_devices/gs201/prebuilts/device-vendor.mk)
 $(call inherit-product-if-exists, vendor/google_devices/gs201/proprietary/device-vendor.mk)
 $(call inherit-product-if-exists, vendor/google_devices/lynx/proprietary/lynx/device-vendor-lynx.mk)
+$(call inherit-product-if-exists, vendor/google_devices/lynx/proprietary/device-vendor.mk)
 
 DEVICE_PACKAGE_OVERLAYS += device/google/lynx/lynx/overlay