libcutils: qtaguid: support socket untagging, return errors.

  - Enable and rename qtaguid_tagSocket()
  - Add qtaguid_untagSocket()
  - Return kernel errors to caller

Change-Id: I8e33c8832b7f6b24ed9081f36ce1ea9ae6b099c0
Signed-off-by: Ashish Sharma <ashishsharma@google.com>
2 files changed