logd: prune 10% or 256 entries max

(cherry pick from commit b39ed0c9925356c74a6347630b04d875288d803b)

Bug: 22351810
Bug: 23327476
Change-Id: I902ba6b431d8b7cee2d65ee2f76e9f7c4f30b152
1 file changed
tree: b592a5c9ce4ce623c4dc7ab69e441eb8c82a4be4
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/