Feature/voice command

[cdhiraj40]

Here are some of the Action points that are done in this PR:

• [x] Created a voice-command module
• [x] Integrated the voice trigger and google-speech kit library
• [x] Added the English model
• [x] Implented the wake word.
• [x] Integrated the recognition of the user's speech and translate it to plain text.
• [x] Both the integration has tested well.
• [x] Added all the Aimybox-specific code to separate a voicecommand module

Trigger words:

1. listen
2. hey car

After testing the trigger word, here are some of the results:

1. listen works fine.
2. while hey car works fine too but voice recognition also gets triggered by just saying hey!
3. While saying just car does not trigger!