[automerger skipped] Merge "Public StatsLog API for generic mainline logging." am: e1556e90
am: c9dfc053 -s ours
am skip reason: change_id I8a9a91e638d730e3ff69cb9345692e49e0db3c96 with SHA1 be0482b4 is in history
Change-Id: I526009a218e99b947923fa770963226f342081ff