aaManeuverType
The Android Auto Maneuver type constant for the current instruction.
Pre-mapped from the MSDK's Instruction types by ManeuverMapper in the GuidanceProviderAdapter. Used by TripBuilder to set the correct turn arrow on the car's instrument cluster and notification display.
Defaults to androidx.car.app.navigation.model.Maneuver.TYPE_UNKNOWN when no instruction data is available or the mapping is not yet computed.