logd: statistics per-pid filter

Primarily gives access to the Chattiest TIDs and TAGs
associated with a pid.

Has a secondary effect of allowing us to pull out the
command line, comm and in some cases the associated
PACKAGE for a specific pid while the logs are still
present even if the executable is gone.

Bug: 26029733
Bug: 21615139
Change-Id: I1ea63165a680a9318360579b70b1512078ed5682
6 files changed
tree: 60c34836073d980a2e45a9d4b5caf7c90c708e9a
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/