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

tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java

@@ -352,6 +352,14 @@ public class PowerUsageSummaryTest {
                 R.string.advanced_battery_title);
     }
 
+    @Test
+    public void testRefreshUi_deviceRotate_doNotUpdateBatteryTip() {
+        mFragment.mNeedUpdateBatteryTip = false;
+        mFragment.refreshUi();
+
+        verify(mFragment, never()).restartBatteryTipLoader();
+    }
+
     public static class TestFragment extends PowerUsageSummary {
         private Context mContext;
 
@@ -364,12 +372,6 @@ public class PowerUsageSummaryTest {
             return mContext;
         }
 
-
-        @Override
-        protected void refreshUi() {
-            // Leave it empty for toggle apps menu test
-        }
-
         @Override
         void showBothEstimates() {
             List<BatteryInfo> fakeBatteryInfo = new ArrayList<>(2);

tests/robotests/src/com/android/settings/fuelgauge/batterytip/BatteryTipPreferenceControllerTest.java

@@ -28,6 +28,7 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
+import android.os.Bundle;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceCategory;
 import android.support.v7.preference.PreferenceGroup;
@@ -133,6 +134,21 @@ public class BatteryTipPreferenceControllerTest {
                 BatteryTip.StateType.NEW);
     }
 
+    @Test
+    public void testSaveAndRestore() {
+        mBatteryTipPreferenceController.updateBatteryTips(mOldBatteryTips);
+        final Bundle bundle = new Bundle();
+        mBatteryTipPreferenceController.saveInstanceState(bundle);
+
+        final BatteryTipPreferenceController controller = new BatteryTipPreferenceController(
+                mContext, KEY_PREF, mSettingsActivity, mFragment, mBatteryTipListener);
+        controller.mPreferenceGroup = mPreferenceGroup;
+        controller.mPrefContext = mContext;
+        controller.restoreInstanceState(bundle);
+
+        assertOnlyContainsSummaryTip(mPreferenceGroup);
+    }
+
     @Test
     public void testHandlePreferenceTreeClick_noDialog_invokeCallback() {
         when(mBatteryTip.getType()).thenReturn(SMART_BATTERY_MANAGER);

tests/robotests/src/com/android/settings/fuelgauge/batterytip/tips/RestrictAppTipTest.java

@@ -148,6 +148,13 @@ public class RestrictAppTipTest {
         assertThat(mNewBatteryTip.getState()).isEqualTo(BatteryTip.StateType.HANDLED);
     }
 
+    @Test
+    public void update_handledAnomlayBecomeInvisible_stateInvisible() {
+        mHandledBatteryTip.updateState(mInvisibleBatteryTip);
+
+        assertThat(mHandledBatteryTip.getState()).isEqualTo(BatteryTip.StateType.INVISIBLE);
+    }
+
     @Test
     public void update_newAnomalyComes_stateNew() {
         mInvisibleBatteryTip.updateState(mNewBatteryTip);