Add a TetherProvisioningActivity for ui-based provisioning.

        <service android:name=".TetherService"

            android:exported="true"

            android:permission="android.permission.TETHER_PRIVILEGED" />

        <activity android:name="TetherProvisioningActivity"

            android:exported="true"

            android:permission="android.permission.TETHER_PRIVILEGED"

            android:theme="@android:style/Theme.Translucent.NoTitleBar">

            <intent-filter android:priority="1">

                <action android:name="android.settings.TETHER_PROVISIONING_UI" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

        </activity>

        <receiver

            android:name=".HotspotOffReceiver" >

            <intent-filter>

/*

 * 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;

import android.app.Activity;

import android.content.Intent;

import android.net.ConnectivityManager;

import android.os.Bundle;

import android.os.ResultReceiver;

import android.os.UserHandle;

import android.util.Log;

/**

 * Activity which acts as a proxy to the tether provisioning app for sanity checks and permission

 * restrictions. Specifically, the provisioning apps require

 * {@link android.permission.CONNECTIVITY_INTERNAL}, while this activity can be started by a caller

 * with {@link android.permission.TETHER_PRIVILEGED}.

 */

public class TetherProvisioningActivity extends Activity {

    private static final int PROVISION_REQUEST = 0;

    private static final String TAG = "TetherProvisioningAct";

    private static final String EXTRA_TETHER_TYPE = "TETHER_TYPE";

    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);

    private ResultReceiver mResultReceiver;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        mResultReceiver = (ResultReceiver)getIntent().getParcelableExtra(

                ConnectivityManager.EXTRA_PROVISION_CALLBACK);

        // TODO: Move isProvisioningNeededButUnavailable into ConnectivityManager and check

        // it here to short-circuit and fail.

        int tetherType = getIntent().getIntExtra(ConnectivityManager.EXTRA_ADD_TETHER_TYPE,

                ConnectivityManager.TETHERING_INVALID);

        String[] provisionApp = getResources().getStringArray(

                com.android.internal.R.array.config_mobile_hotspot_provision_app);

        Intent intent = new Intent(Intent.ACTION_MAIN);

        intent.setClassName(provisionApp[0], provisionApp[1]);

        intent.putExtra(EXTRA_TETHER_TYPE, tetherType);

        if (DEBUG) {

            Log.d(TAG, "Starting provisioning app: " + provisionApp[0] + "." + provisionApp[1]);

        }

        startActivityForResultAsUser(intent, PROVISION_REQUEST, UserHandle.CURRENT);

    }

    @Override

    public void onActivityResult(int requestCode, int resultCode, Intent intent) {

        super.onActivityResult(requestCode, resultCode, intent);

        if (requestCode == PROVISION_REQUEST) {

            if (DEBUG) Log.d(TAG, "Got result from app: " + resultCode);

            int result = resultCode == Activity.RESULT_OK ?

                    ConnectivityManager.TETHER_ERROR_NO_ERROR :

                    ConnectivityManager.TETHER_ERROR_PROVISION_FAILED;

            mResultReceiver.send(result, null);

            finish();

        }

    }

}