Add SafeSearch content filters preference.

Test: atest SupervisionSafeSearchPreferenceTest
Test: locally deployed on physical device
Bug: 401569571
Flag: android.app.supervision.flags.enable_web_content_filters_screen
Change-Id: Ia889c4c8f4df8d1b714909b19a7e0b5ef40154cf

src/com/android/settings/supervision/SupervisionSafeSearchPreference.kt

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2025 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.supervision
+
+import android.content.Context
+import androidx.preference.Preference
+import com.android.settings.R
+import com.android.settingslib.datastore.KeyValueStore
+import com.android.settingslib.datastore.Permissions
+import com.android.settingslib.datastore.SettingsSecureStore
+import com.android.settingslib.metadata.BooleanValuePreference
+import com.android.settingslib.metadata.PreferenceMetadata
+import com.android.settingslib.metadata.ReadWritePermit
+import com.android.settingslib.metadata.SensitivityLevel
+import com.android.settingslib.preference.PreferenceBinding
+import com.android.settingslib.preference.forEachRecursively
+import com.android.settingslib.widget.SelectorWithWidgetPreference
+
+/** Base class of web content filters SafeSearch preferences. */
+sealed class SupervisionSafeSearchPreference :
+    BooleanValuePreference, SelectorWithWidgetPreference.OnClickListener, PreferenceBinding {
+    override fun storage(context: Context): KeyValueStore = SettingsSecureStore.get(context)
+
+    override fun getReadPermissions(context: Context) = Permissions.EMPTY
+
+    override fun getWritePermissions(context: Context) = Permissions.EMPTY
+
+    override fun getReadPermit(context: Context, callingPid: Int, callingUid: Int) =
+        ReadWritePermit.ALLOW
+
+    override fun getWritePermit(
+        context: Context,
+        value: Boolean?,
+        callingPid: Int,
+        callingUid: Int,
+    ) = ReadWritePermit.DISALLOW
+
+    override val sensitivityLevel
+        get() = SensitivityLevel.NO_SENSITIVITY
+
+    override fun createWidget(context: Context) = SelectorWithWidgetPreference(context)
+
+    override fun onRadioButtonClicked(emiter: SelectorWithWidgetPreference) {
+        emiter.parent?.forEachRecursively {
+            if (it is SelectorWithWidgetPreference) {
+                it.isChecked = it == emiter
+            }
+        }
+    }
+
+    override fun bind(preference: Preference, metadata: PreferenceMetadata) {
+        super.bind(preference, metadata)
+        (preference as SelectorWithWidgetPreference).also {
+            // TODO(b/401568995): Set the isChecked value using stored values.
+            it.isChecked = (it.key == SupervisionSearchFilterOffPreference.KEY)
+            it.setOnClickListener(this)
+        }
+    }
+}
+
+/** The SafeSearch filter on preference. */
+class SupervisionSearchFilterOnPreference : SupervisionSafeSearchPreference() {
+
+    override val key
+        get() = KEY
+
+    override val title
+        get() = R.string.supervision_web_content_filters_search_filter_on_title
+
+    override val summary
+        get() = R.string.supervision_web_content_filters_search_filter_on_summary
+
+    companion object {
+        const val KEY = "web_content_filters_search_filter_on"
+    }
+}
+
+/** The SafeSearch filter off preference. */
+class SupervisionSearchFilterOffPreference : SupervisionSafeSearchPreference() {
+
+    override val key
+        get() = KEY
+
+    override val title
+        get() = R.string.supervision_web_content_filters_search_filter_off_title
+
+    override val summary
+        get() = R.string.supervision_web_content_filters_search_filter_off_summary
+
+    companion object {
+        const val KEY = "web_content_filters_search_filter_off"
+    }
+}