Unbind buffer when buffer is deleted

When buffer is deleted, it should be un-bind also.
Also fix error code related to buffer

Change-Id: I3e7ec88399822469a36119c2de03157a2bbea812
2 files changed
tree: feefe9b92d41ebdc0fc7235adb9b496f41c6ff9d
  1. host/
  2. shared/
  3. system/
  4. tests/
  5. Android.mk
  6. common.mk
  7. README