tree e0b854a920739847b12e1892bb736cc55b472fe1
parent c449216beeab76bc14c7c101a3926f7e295b1d00
author Hongwei Wang <hwwang@google.com> 1558723427 -0700
committer Hongwei Wang <hwwang@google.com> 1558727592 -0700

Make sure primary audio zone has highest priority

Did also code cleanup including
- Remove unused variable
- Prefer package private to public

Bug: 131090322
Test: dumpsys car_service | grep -A70 CarAudioService
Change-Id: I48b2e870cc9d259f84ee506fd6504985d5032534