VoiceCommandManager should not send commands with duplicate strings.

[renonick87]

Bug Report

The VoiceCommandManager is not filtering out VoiceCommands with duplicate strings when sending AddCommands.

Reproduction Steps

1. Send a voice command array (3 voice commands, each with 2 strings). One voice command should have both strings as the same. e.g. ("Command 1", "Command 1"), ("Command 2", "Command 3"), ("Command 4", "Command 5")

Expected Behavior

Only the VoiceCommands without duplicate strings should be sent, and an error should be logged.

Observed Behavior

All VoiceCommands are sent and duplicate commands appear in the HMI.

Test Case, Sample Code, and / or Example App

In this sample code, the first VoiceCommand should not be sent.

screenManager.setVoiceCommands([
    new SDL.manager.screen.utils.VoiceCommand(['Option 1', 'Option 1'], () => {}),
    new SDL.manager.screen.utils.VoiceCommand(['Option 2', 'Option 3'], () => {}),
    new SDL.manager.screen.utils.VoiceCommand(['Option 4', 'Option 5'], () => {}),
]);

[renonick87]

Closed by #414.