Some improvements to the battery usage UI:

- Show wake lock usage in the battery history.
- Show WIFI usage in the battery history.
- Show the amount an app has held a wake lock in the app details.
- Also fix service run time computation in running services.

Change-Id: I5aa959857f83808fbc709f65204f59bbfb73935b

src/com/android/settings/fuelgauge/BatterySipper.java

@@ -46,6 +46,7 @@ class BatterySipper implements Comparable<BatterySipper> {
     long cpuTime;
     long gpsTime;
     long cpuFgTime;
+    long wakeLockTime;
     double percent;
     double noCoveragePercent;
     String defaultPackageName;