Add Rust target for VehicleHalProtos

In our project we integrate vehicle properties definition and reused some of the existing message types (`VehiclePropConfig` and `VehicleAreaConfig`), so we need to depend on a Rust target of the protos.

Bug: 346786677

Test: m
Change-Id: If99f1763e38a9f8bb0ac4dd9ba5e1bee22cc54a7