Cancel vibration

Cancel vibration

See: https://docs.google.com/document/d/18b32aveubsr2g5Co_VeW4q3s3IXxuddUU2BO5eC3jVA/edit

Cancelling any existing vibrations:
The following example cancels any existing vibrations: (section 5 of spec)

// cancel any existing vibrations
navigator.vibrate(0);

// or alternatively
navigator.vibrate([]);