Fix statsd logging in BatteryStats (nesting prob.)

Several statsd atoms are not logged correctly from batterystats, due to
possible nesting issues (batterystats only reports a single stop at the
end, whereas statsd expects each stop, resulting in statsd thinking that
the event is still continuing). This cl fixes those.

Bug: 69478888
Test: current ones still pass
Change-Id: I3ae8d7cc3d2eec7d4ab2721c83d208384adbf690