Refactor all voicemail audio handling to new audio manager class.

Since voicemail audio handling is about to get more complicated (adding
head phone switching and bluetooth), we need a separate class to handle
audio.

Bug: 23816959
Change-Id: If891739ef80f5646145d7a44ec70f5b7544010b0
2 files changed
tree: ec78f48a40ad69f834f43d0a4e599d1cd8b19b1b
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags