Settings: Add a preference controller for Volume steps settings

* Enable volume steps pref by default

res/values/lineage_config.xml

@@ -67,4 +67,7 @@
 
     <!-- Whether to show double tap ambient settings -->
     <bool name="config_supports_double_tap_ambient" translatable="false">false</bool>
+
+    <!-- Whether to show volume steps settings -->
+    <bool name="config_supports_volume_steps" translatable="false">true</bool>
 </resources>

res/xml/sound_settings.xml

@@ -116,8 +116,9 @@
         android:key="volume_steps"
         android:title="@string/volume_steps_title"
         android:summary="@string/volume_steps_summary"
-        android:fragment="com.android.settings.sound.VolumeSteps"
+        android:fragment="com.android.settings.sound.VolumeStepsSettings"
-        android:order="-135"/>
+        android:order="-135"
+        settings:controller="com.android.settings.sound.VolumeStepsPreferenceController"/>
 
     <!-- TODO(b/174964721): make this a PrimarySwitchPreference -->
     <!-- Interruptions -->

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -199,7 +199,7 @@ import com.android.settings.security.SecurityAdvancedSettings;
 import com.android.settings.security.SecuritySettings;
 import com.android.settings.shortcut.CreateShortcut;
 import com.android.settings.sound.MediaControlsSettings;
-import com.android.settings.sound.VolumeSteps;
+import com.android.settings.sound.VolumeStepsSettings;
 import com.android.settings.support.SupportDashboardActivity;
 import com.android.settings.system.ResetDashboardFragment;
 import com.android.settings.system.SystemDashboardFragment;
@@ -428,7 +428,7 @@ public class SettingsGateway {
             ToggleScreenMagnificationPreferenceFragment.class.getName(),
             FlashNotificationsPreferenceFragment.class.getName(),
             PrivateDnsSettings.class.getName(),
-            VolumeSteps.class.getName(),
+            VolumeStepsSettings.class.getName(),
     };
 
     public static final String[] SETTINGS_FOR_RESTRICTED = {

src/com/android/settings/sound/VolumeStepsPreferenceController.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2019-2024 The Evolution X 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.sound;
+
+import android.content.Context;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+
+public class VolumeStepsPreferenceController extends BasePreferenceController {
+
+    public VolumeStepsPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mContext.getResources().getBoolean(R.bool.config_supports_volume_steps)
+                ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+}

src/com/android/settings/sound/VolumeStepsSettings.java

@@ -37,10 +37,10 @@ import org.evolution.settings.preferences.CustomSeekBarPreference;
  * volume steps settings under sound
  */
 @SearchIndexable
-public class VolumeSteps extends SettingsPreferenceFragment implements
+public class VolumeStepsSettings extends SettingsPreferenceFragment implements
         Preference.OnPreferenceChangeListener {
 
-    private static final String TAG = "VolumeSteps";
+    private static final String TAG = "VolumeStepsSettings";
 
     @Override
     public void onCreate(Bundle savedInstanceState) {