[1/2] PerformanceControl: wakelock fragment enhancements

-rework time period filters. The "since boot" does not show valid
data for android (partial) wakelocks. Added time since unplug instead.
Also android wakelock data is only valid if on battery so check status.
Reset can now only be "inside"unplug period.

-added app wakelock view which groups partial wakelocks
based on apps

Change-Id: I3bef68c93cdd228e8ca3c2d54d4a1f8501e6bf48