Migrate Battery Saver

Add the skeleton of the Battery Saver

Test: atest BatterySaverScreenTest
Bug: 368359126
Flag: com.android.settings.flags.catalyst_battery_saver_screen
Change-Id: I05a694c34468c01e4e032275567acbf37615c6f0

src/com/android/settings/fuelgauge/batterysaver/BatterySaverScreen.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2024 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.batterysaver
+
+import android.content.Context
+import com.android.settings.R
+import com.android.settings.flags.Flags
+import com.android.settingslib.metadata.ProvidePreferenceScreen
+import com.android.settingslib.metadata.preferenceHierarchy
+import com.android.settingslib.preference.PreferenceScreenCreator
+
+@ProvidePreferenceScreen
+class BatterySaverScreen : PreferenceScreenCreator {
+    override val key: String
+        get() = KEY
+
+    override val title: Int
+        get() = R.string.battery_saver
+
+    override val keywords: Int
+        get() = R.string.keywords_battery_saver
+
+    override fun isFlagEnabled(context: Context) = Flags.catalystBatterySaverScreen()
+
+    override fun fragmentClass() = BatterySaverSettings::class.java
+
+    override fun hasCompleteHierarchy() = false
+
+    override fun getPreferenceHierarchy(context: Context) = preferenceHierarchy(this) {}
+
+    companion object {
+        const val KEY = "battery_saver_screen"
+    }
+}

src/com/android/settings/fuelgauge/batterysaver/BatterySaverSettings.java

@@ -17,8 +17,11 @@
 package com.android.settings.fuelgauge.batterysaver;
 
 import android.app.settings.SettingsEnums;
+import android.content.Context;
 import android.text.TextUtils;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
 import com.android.settings.R;
@@ -93,4 +96,10 @@ public class BatterySaverSettings extends DashboardFragment {
             pref.setLearnMoreText(getString(R.string.battery_saver_link_a11y));
         }
     }
+
+    @Nullable
+    @Override
+    public String getPreferenceScreenBindingKey(@NonNull Context context) {
+        return BatterySaverScreen.KEY;
+    }
 }