Add kill-switch to distinguish chart or non-chart design

Bug: 184807417
Bug: 180607918
Test: make SettingsRoboTests
Test: make SettingsGoogleRoboTests
Change-Id: Iacbb012209d552b58b774f90f5b0aeb60ce6d33d

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

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package com.android.settings.fuelgauge;
+
+import android.content.Context;
+import android.util.Log;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.core.InstrumentedPreferenceFragment;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnDestroy;
+import com.android.settingslib.core.lifecycle.events.OnPause;
+
+import java.util.List;
+import java.util.Map;
+
+/** Cotrols the update for chart graph and the list items. */
+public class BatteryChartPreferenceController extends AbstractPreferenceController
+        implements PreferenceControllerMixin, LifecycleObserver, OnPause, OnDestroy {
+    private static final String TAG = "BatteryChartPreferenceController";
+
+    private final String mPreferenceKey;
+
+    public BatteryChartPreferenceController(
+            Context context, String chartPreferenceKey, String listPreferenceKey,
+            Lifecycle lifecycle, SettingsActivity activity,
+            InstrumentedPreferenceFragment fragment) {
+        super(context);
+        mPreferenceKey = listPreferenceKey;
+    }
+
+
+    @Override
+    public void onPause() {
+    }
+
+    @Override
+    public void onDestroy() {
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return mPreferenceKey;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    void refreshUi(Map<Long, List<BatteryHistEntry>> batteryHistoryMap) {
+        Log.d(TAG, "refreshUi:" + batteryHistoryMap.size());
+    }
+}