Update strings in battery settings.

1. Message in high usage dialog
2. Title in app usage list

Change-Id: Iac610483e10e8d2a93a18ca664aec17d9561aaf8
Fixes: 78638843
Test: RunSettingsRoboTests

src/com/android/settings/fuelgauge/batterytip/BatteryTipDialogFragment.java

@@ -94,10 +94,7 @@ public class BatteryTipDialogFragment extends InstrumentedDialogFragment impleme
 
                 return new AlertDialog.Builder(context)
                         .setMessage(getString(R.string.battery_tip_dialog_message,
-                                highUsageTip.getHighUsageAppList().size(),
-                                StringUtil.formatRelativeTime(context,
-                                        highUsageTip.getLastFullChargeTimeMs(),
-                                        false /* withSeconds */)))
+                                highUsageTip.getHighUsageAppList().size()))
                         .setView(view)
                         .setPositiveButton(android.R.string.ok, null)
                         .create();