Dianne Hackborn ca1bf21c51 Implement wifi part of issue #12973036: Improve power_profile.xml
Add battery stats tracking of wifi state.

Also update when we retrieve the current time to use a more
consistent value across stats tracking.

Change-Id: I6a7c3efd58ff2c8ea86dac141c8f848e7996d63f
2014-02-18 14:43:14 -08:00
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