Map volume key to click on screen for VR

1. Automate Community
2. Tools

Map volume up and volume down key (which are often used by remote of selfie sticks) to a click at the center of the screen. Works great with cheap VR headsets that uses the phone as screen to make them compatible with Google Cardboard apps.

Update 1: add a notification to make stopping it easier

Update 2: add a quick tile for easier activation