liblog: cleanup opaque type usage

There's a lot of unnecessary boilerplate around these opaque types,
and this change simplifies it.

Test: liblog-unit-tests
Change-Id: I0c4e133037fd5f04157ac22175181a6a496e18c4
5 files changed
tree: 1373521aaa18fc50b4593c618a1534a6922b6152
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/