Android VHAL Requirements

Name	Short Descripition	Topic	Reference
Usable by 3rd Party Apps	All vehicle properties must be usable by apps installed from the app store.	SYSTEM vs. VENDOR properties	https://cs.android.com/android/platform/superproject/main/+/main:hardware/interfaces/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehiclePropertyGroup.aidl
Consistent cross-OEM IDs	All vehicle properties must have consistent ID regardless of the OEM.		https://cs.android.com/android/platform/superproject/main/+/main:packages/services/Car/car-lib/src/android/car/VehiclePropertyIds.java
Extensible outside the platform	Vehicle properties should be extendable outside the AOSP platform code.
Permission per vehicle property	Each vehicle property must be protected by a specific permission to enable fine grain access.		https://cs.android.com/android/platform/superproject/main/+/main:packages/services/Car/car-lib/src/android/car/hardware/property/VehicleVendorPermission.java
Permission per read/write	Read and write access must have different permissions to enable read or write-only.
OEM defined access	OEM must be able to define which app may get access to which properties (read/write)		https://developer.android.com/guide/topics/permissions/overview
Dynamic permission grants	OEM must be able to grant or revoke access per app and vehicle property over the lifetime of the vehicle	Runtime, Dangerous permissions without user interaction

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