Merge changes from topic "ender-audio" into gce-dev

* changes:
  Tailor AUDIO command to VSOC
  VSOC Audio: Rename gce_ -> vsoc_
  Tailor remoter framework pkt to work on cuttlefish
  Exact copy of RemoterFrameworkPkt from GCE
  Exact copy of GCE Audio
tree: 41671a746594e823787f7cffecbf8373134983c4
  1. common/
  2. external/
  3. guest/
  4. host/
  5. tools/
  6. Android.mk
  7. BUILD
  8. WORKSPACE