Add AOSP support for Raven and Oriole.

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 names are
platform/vendor/aosp/google_devices/raven
platform/vendor/aosp/google_devices/oriole

and the paths are
vendor/google_devices/raven
vendor/google_devices/oriole

BUG: 182332166
Change-Id: I947934c7f2d38c6fe504cfe8a4368d9b426e4b48
4 files changed