tree d85f9030a2e2ef8d41e479a8c08584534b285253
parent 056dd6aace31f76e635ac0befb6b02f61ca11c43
author Mike Ma <yanmin@google.com> 1507674565 -0700
committer Mike Ma <yanmin@google.com> 1507675193 +0000

Attribute UNKNOWN display state to OFF

When device restarts, screen state is set to unknown, all
timebases stop. Then if setBatteryStateLocked() is called
with unplugged state, onBatteryTimeBase starts, but
onBatteryScreenOffTimeBase does not, so does ScreenOnTimer,
since screen state == unknown. So this duration is lost.
This fix attributes unknown state to ScreenOff.

Fixes: 67608353
Test: added a unit test in BatteryStatsNoteTest
Change-Id: Iee68898522564963e7d0b0110f1aee9248aacfe8