Refine the update process of battery tip

1. When device is rotated, don't update the battery tip
2. When user go back to battery main page from other page, start
battery tip update process
3. In RestrictAppTip, if there aren't restricted apps anymore,
hide the tip.

Bug: 74467010
Test: RunSettingsRobotests

Change-Id: I300bcc5b487d587f6618e340ac074fe416dcc1b2

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

@@ -105,6 +105,8 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
     SparseArray<List<Anomaly>> mAnomalySparseArray;
     @VisibleForTesting
     BatteryHeaderPreferenceController mBatteryHeaderPreferenceController;
+    @VisibleForTesting
+    boolean mNeedUpdateBatteryTip;
     private BatteryTipPreferenceController mBatteryTipPreferenceController;
     private int mStatsType = BatteryStats.STATS_SINCE_CHARGED;
 
@@ -211,6 +213,8 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
         mAnomalySparseArray = new SparseArray<>();
 
         restartBatteryInfoLoader();
+        mNeedUpdateBatteryTip = icicle == null;
+        mBatteryTipPreferenceController.restoreInstanceState(icicle);
     }
 
     @Override
@@ -291,7 +295,12 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
             return;
         }
 
-        restartBatteryTipLoader();
+        // Only skip BatteryTipLoader for the first time when device is rotated
+        if (mNeedUpdateBatteryTip) {
+            restartBatteryTipLoader();
+        } else {
+            mNeedUpdateBatteryTip = true;
+        }
 
         // reload BatteryInfo and updateUI
         restartBatteryInfoLoader();
@@ -385,6 +394,12 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
         restartBatteryStatsLoader(true /* clearHeader */);
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        mBatteryTipPreferenceController.saveInstanceState(outState);
+    }
+
     void restartBatteryStatsLoader(boolean clearHeader) {
         super.restartBatteryStatsLoader();
         if (clearHeader) {