liblog: logd: logcat: Split out log/logger.h into public and private.
am: 5ae7c34058

Change-Id: I124c69673c30bb5f2259849792ed4ca99f4d6b60
tree: 4344f75778593f83e100614517111e8408aae83b
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/