Add logblame and some log buffer tests.

(cherry picked from commit 75f444e139793892c0b7d8d7df579624a6431d0c)

A utility to read a logcat and print statistics about who is spamming the log.
And tests that use it

Signed-off-by: Joe Onorato <joeo@google.com>
Bug: 37252687
Test: ./test_analyze.py ; test_logs.py ; test_ps.py
Change-Id: I811ba482b4be9779047f97c3f3b7ea5f996bd503
12 files changed