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/applications/RunningServiceDetails.java

@@ -92,8 +92,8 @@ public class RunningServiceDetails extends Activity
                         & ApplicationInfo.FLAG_SYSTEM) != 0;
                 ApplicationErrorReport.RunningServiceInfo info
                         = new ApplicationErrorReport.RunningServiceInfo();
-                if (mActiveItem.mItem.mActiveSince >= 0) {
-                    info.durationMillis = SystemClock.uptimeMillis()-mActiveItem.mFirstRunTime;
+                if (mActiveItem.mFirstRunTime >= 0) {
+                    info.durationMillis = SystemClock.elapsedRealtime()-mActiveItem.mFirstRunTime;
                 } else {
                     info.durationMillis = -1;
                 }