logd: separate PruneList from LogBuffer

logd needs a pointer to PruneList, but it should not own it and it
should not have initPrune() or formatPrune() functions.

Test: logging unit tests
Change-Id: Id1668c26d07eb5d1e4cf267f5748c20a79f711ae
6 files changed
tree: 6b4a06d174fab0bfcba4e41f9d72845df5da6737
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/