Merge "Clean ProxyPreferenceController" into main

        controllers.add(new MobileNetworkSummaryController(context, lifecycle, lifecycleOwner));

        controllers.add(new TetherPreferenceController(context, lifecycle));

        controllers.add(vpnPreferenceController);

        controllers.add(new ProxyPreferenceController(context));

        if (internetPreferenceController != null) {

            controllers.add(internetPreferenceController);

        }

/*

 * Copyright (C) 2016 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.network;

import android.app.admin.DevicePolicyManager;

import android.content.Context;

import androidx.preference.Preference;

import androidx.preference.PreferenceScreen;

import com.android.settings.core.PreferenceControllerMixin;

import com.android.settingslib.core.AbstractPreferenceController;

public class ProxyPreferenceController extends AbstractPreferenceController

        implements PreferenceControllerMixin {

    private static final String KEY_PROXY_SETTINGS = "proxy_settings";

    public ProxyPreferenceController(Context context) {

        super(context);

    }

    @Override

    public boolean isAvailable() {

        // proxy UI disabled until we have better app support

        return false;

    }

    @Override

    public void displayPreference(PreferenceScreen screen) {

        super.displayPreference(screen);

        // Enable Proxy selector settings if allowed.

        final Preference pref = screen.findPreference(KEY_PROXY_SETTINGS);

        if (pref != null) {

            final DevicePolicyManager dpm = (DevicePolicyManager)

                    mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);

            pref.setEnabled(dpm.getGlobalProxyAdmin() == null);

        }

    }

    @Override

    public String getPreferenceKey() {

        return KEY_PROXY_SETTINGS;

    }

}