Allow areaId JSON fields to inherit from property fields.

Update json config parser to V2, which allows areaId fields, e.g.
minInt32Value to inherit from parent property fields.

This CL also updates the test JSON file to move the common fields
up one level to avoid duplication.

We increase the JSON file version because the new version is not
compatible with an older parser.

Test: atest FakeVehicleHardwareTest JsonConfigLoaderTest
Flag: EXEMPT refactor
Bug: 395147447
Change-Id: Ib0fa499e31888cfee197f6c4e44f73f509300a4f