Now supports loading model information from .properties files inside the
app's data directory. This lets you prepare models for your actual
device, rather than just fake data. If no .properties files are present,
falls back to the default fake three models.
Also adds support for playing some trigger audio, so you can use the
same device to (hopefully) have a trigger be detected.
Change-Id: I003849eb11d4995534d4c070838810d4519991f8
15ab2b45e7