Nexus Headphone Buzzing Fix

Fixes the Nexus 6p buzzing noise when headphones are plugged in. The app works via looping a soundless audio file when headphones are physically plugged into the device. The headset-plugged-in check is done to limit unnecessary battery drain.

The exact bug tracking page can be found at https://productforums.google.com/forum/#!topic/nexus/2cyztiyq-hw

Source for the app can be found at https://github.com/radixdev/angler-debuzzer