[SDL 0318] App Library: Vehicle Data Manager

[theresalech]

Proposal: App Library: Vehicle Data Manager

This proposal introduces the VehicleDataManager to include high-level app library APIs for interacting with vehicle data RPCs.

Review: https://github.com/smartdevicelink/sdl_evolution/issues/1071

Steering Committee Decision:

The Steering Committee voted to accept this proposal with revisions. In this section, the method name should be getVehicleData. In this section, updateCapabilities should be named updateVehicleData. In this section the method should be named updateVehicleData. Additionally, in this section, the method names should be addPermissionListener and removePermissionListener. In this section, the method names should be addPermissionListener and removePermissionListener.

The proposal .md file was updated to reflect these revisions on 9/3/2020.