liblog: remove visibility macros

Visibility is managed through version scripts now.

Bug: 123349183
Test: build
Change-Id: Ia388611a2ec14d0ff9c3896cfe97ccdce17dbb8b
26 files changed
tree: 687d7649f8a78ffbe00b8935e8801ac6275a7b10
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/