Add toggle to show/hide the Per Device Enable LE Audio Toggle in Device details

Bug: 280020008
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothLeAudioDeviceDetailsPreferenceControllerTest
Change-Id: I559f34f2b0764c4f566fe1e0c1357929e2c88fb6

src/com/android/settings/development/BluetoothLeAudioDeviceDetailsPreferenceController.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2023 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.development;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.BluetoothStatusCodes;
+import android.content.Context;
+import android.provider.DeviceConfig;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.core.SettingsUIDeviceConfig;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+/**
+ * Preference controller to control whether display Bluetooth LE audio toggle in device detail
+ * settings page or not.
+ */
+public class BluetoothLeAudioDeviceDetailsPreferenceController
+        extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    private static final String PREFERENCE_KEY = "bluetooth_show_leaudio_device_details";
+    static int sLeAudioSupportedStateCache = BluetoothStatusCodes.ERROR_UNKNOWN;
+
+    @VisibleForTesting
+    BluetoothAdapter mBluetoothAdapter;
+
+    public BluetoothLeAudioDeviceDetailsPreferenceController(Context context) {
+        super(context);
+        mBluetoothAdapter = context.getSystemService(BluetoothManager.class).getAdapter();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREFERENCE_KEY;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        if (sLeAudioSupportedStateCache == BluetoothStatusCodes.ERROR_UNKNOWN
+                && mBluetoothAdapter != null) {
+            int isLeAudioSupported = mBluetoothAdapter.isLeAudioSupported();
+            if (isLeAudioSupported != BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED) {
+                sLeAudioSupportedStateCache = isLeAudioSupported;
+            }
+        }
+
+        // Display the option only if LE Audio is supported
+        return (sLeAudioSupportedStateCache == BluetoothStatusCodes.FEATURE_SUPPORTED);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        DeviceConfig.setProperty(
+                DeviceConfig.NAMESPACE_SETTINGS_UI,
+                SettingsUIDeviceConfig.BT_LE_AUDIO_DEVICE_DETAIL_ENABLED,
+                isEnabled ? "true" : "false", false);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (!isAvailable()) {
+            return;
+        }
+
+        final boolean leAudioDeviceDetailEnabled = DeviceConfig.getBoolean(
+                DeviceConfig.NAMESPACE_SETTINGS_UI,
+                SettingsUIDeviceConfig.BT_LE_AUDIO_DEVICE_DETAIL_ENABLED, false);
+
+        ((SwitchPreference) mPreference).setChecked(leAudioDeviceDetailEnabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        // Reset the toggle to null when the developer option is disabled
+        DeviceConfig.setProperty(
+                DeviceConfig.NAMESPACE_SETTINGS_UI,
+                SettingsUIDeviceConfig.BT_LE_AUDIO_DEVICE_DETAIL_ENABLED, "null", false);
+    }
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -660,6 +660,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new BluetoothAvrcpVersionPreferenceController(context));
         controllers.add(new BluetoothMapVersionPreferenceController(context));
         controllers.add(new BluetoothLeAudioPreferenceController(context, fragment));
+        controllers.add(new BluetoothLeAudioDeviceDetailsPreferenceController(context));
         controllers.add(new BluetoothLeAudioAllowListPreferenceController(context, fragment));
         controllers.add(new BluetoothA2dpHwOffloadPreferenceController(context, fragment));
         controllers.add(new BluetoothLeAudioHwOffloadPreferenceController(context, fragment));