tree 091df1d1042b6f349a1be4a64bebe9decfb8329c
parent 5719a7f478922ea6d937ecb179fa29d431582b89
author Chris Wren <cwren@android.com> 1466802460 -0400
committer Chris Wren <cwren@android.com> 1466803311 -0400

use an observer for the default sound

matches other settings use, and also improves testability of buzzbeepblink

Change-Id: I9445448c4c4f24f4f49f7cb1fdcd2f5362944606