Quick hack fix for USB accessory audio support
Mike Lockwood authored
tinyalsa fails to retrieve the correct value for the period count
from the f_audio_source driver and tries to use zero instead.
This wasn't a problem before because the usb audio HAL used hard coded values
that were compatible with the driver.

Bug: 16799652
Change-Id: I6f5b907a0699c58b071e9f419ed8e053a7d9dc77
7de76b2d