Add Battery Defender feature to Settings

- Reupload CL from ag/13108999 to fix the merge conflict
 - Adding new tips of Battery Defender, will be presented once battery is overheated
 - Launch Help Center article of battery overheat when clicking Battery Defender tip
 Screenshots: https://screenshot.googleplex.com/7jUibTJANgR6UQ6.png
 	      https://screenshot.googleplex.com/tUj2LLi87SfndBN.png

Bug: 172794045
Bug: 173497281
Bug: 173496188
Test: make RunSettingsRoboTests -j40
Change-Id: Ibb106a5d42cdf6232abf9ddf4b3225bdcebccf4a

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

@@ -124,7 +124,9 @@ public class BatteryHeaderPreferenceController extends BasePreferenceController
     public void updateHeaderPreference(BatteryInfo info) {
         mBatteryPercentText.setText(formatBatteryPercentageText(info.batteryLevel));
         if (!mBatteryStatusFeatureProvider.triggerBatteryStatusUpdate(this, info)) {
-            if (info.remainingLabel == null) {
+            if (BatteryUtils.isBatteryDefenderOn(info)) {
+                mSummary1.setText(null);
+            } else if (info.remainingLabel == null) {
                 mSummary1.setText(info.statusLabel);
             } else {
                 mSummary1.setText(info.remainingLabel);