[webapi] Reomve Vehicle info ZonePosition attributes and update VehicleI...

...nterface

- Since ZonePosition attributes not exist in Zone according to new spec, So reomve these attributes test
- availabilityChangedListener and removeAvailabilityChangedListener in tizen.vehicle.vehicleSpeed

Impacted TCs num(approved): New 0, Update 2, Delete 19
Unit test Platform: Tizen IVI
Tizen test result summary: Pass 4, Fail 20, Blocked 0
Shall check more here, e.g. typeof and value of zone