Replaced PocketSphinx with Vosk, Added new adapted model, and other enhancements

[devAyushDubey]

Under GSoC '23

This PR resolves the following existing bugs/ enhancements in the feature/voicecommand branch:

• [x] Fixes #979
• [x] Closes #982
  

Following new changes are implemented:

• [x] Removed PocketSphinx speechkit and .aar dependencies from AimyBox
• [x] Added Vosk speechkit for improved wake word detection
• [x] Replaced the old model with new adapted vosk model for envirocar listen

[devAyushDubey]

Hey @cdhiraj40 changes are done, do give it a look. Thanks