Implement battery_usage_stats_before_reset pull atom

Bug: 187223764
Test: m statsd_testdrive; statsd_testdrive 10111
Change-Id: I3c27deb57672d962f1029219b50d21d784c997b7
Merged-In: I3c27deb57672d962f1029219b50d21d784c997b7
(cherry picked from commit 0d25efa419034e7ac06edab9729f55f6b1ffe8ac)
3 files changed