Setting an empty voice command array should clear the list of voice commands

[renonick87]

Bug Report

Sending an empty voice command array to screenManager.steVoiceCommands() should clear the list of voice commands displayed in the HMI. This is because the statement used to check if the provided voice commands are equal to the current voice commands does not take an empty array into consideration.
!voiceCommands.map((vc, index) => vc.equals(this._voiceCommands[index])).includes(false)
This statement returns false for an empty array and stops the manager from continuing.

Reproduction Steps

1. Call screenManager.setVoiceCommands([]); with an empty array.

Expected Behavior

The library should delete all available voice commands.

Observed Behavior

The action fails, the message Voice commands list non-existent or matches the current voice commands is logged to the console, and and no voice commands are deleted.