Various proc stats UI improvements.

- Option to include system processes.
- Option to use uss instead of pss sizes.
- Option to select type of stats: background processes, foreground (top)
  processes, cached processes.
- Details now shows max mem usage.

Change-Id: Ic994564ce846bc1021bf35576feeb9ef095b0e48

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

@@ -340,7 +340,7 @@ public class BatteryHistoryChart extends View {
         long uSecTime = mStats.computeBatteryRealtime(SystemClock.elapsedRealtime() * 1000,
                 BatteryStats.STATS_SINCE_CHARGED);
         mStatsPeriod = uSecTime;
-        String durationString = Utils.formatElapsedTime(getContext(), mStatsPeriod / 1000);
+        String durationString = Utils.formatElapsedTime(getContext(), mStatsPeriod / 1000, true);
         mDurationString = getContext().getString(R.string.battery_stats_on_battery,
                 durationString);
         mChargingLabel = getContext().getString(R.string.battery_stats_charging_label);
@@ -382,7 +382,7 @@ public class BatteryHistoryChart extends View {
             mHavePhoneSignal = true;
         }
         if (mHistEnd <= mHistStart) mHistEnd = mHistStart+1;
-        mTotalDurationString = Utils.formatElapsedTime(getContext(), mHistEnd - mHistStart);
+        mTotalDurationString = Utils.formatElapsedTime(getContext(), mHistEnd - mHistStart, true);
     }
 
     @Override