SIP: clean up unused class and fields.

    private static final String LOG_TAG = "SipPhone";

    private static final boolean LOCAL_DEBUG = true;

    //private List<SipConnection> connections = new ArrayList<SipConnection>();

    // A call that is ringing or (call) waiting

    private SipCall ringingCall = new SipCall();

    private SipCall foregroundCall = new SipCall();

/*

 * Copyright (C) 2010 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 android.net.sip;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.content.ServiceConnection;

import android.os.ConditionVariable;

import android.os.IBinder;

import android.os.IInterface;

import android.os.Looper;

import android.util.Log;

// TODO: throw away this class after moving SIP classes to framework

// This class helps to get IBinder instance of a service in a blocking call.

// The method cannot be called in app's main thread as the ServiceConnection

// callback will.

class BinderHelper<T extends IInterface> {

    private Context mContext;

    private IBinder mBinder;

    private Class<T> mClass;

    BinderHelper(Context context, Class<T> klass) {

        mContext = context;

        mClass = klass;

    }

    void startService() {

        mContext.startService(new Intent(mClass.getName()));

    }

    void stopService() {

        mContext.stopService(new Intent(mClass.getName()));

    }

    IBinder getBinder() {

        // cannot call this method in app's main thread

        if (Looper.getMainLooper().getThread() == Thread.currentThread()) {

            throw new RuntimeException(

                    "This method cannot be called in app's main thread");

        }

        final ConditionVariable cv = new ConditionVariable();

        cv.close();

        ServiceConnection c = new ServiceConnection() {

            public synchronized void onServiceConnected(

                    ComponentName className, IBinder binder) {

                Log.v("BinderHelper", "service connected!");

                mBinder = binder;

                cv.open();

                mContext.unbindService(this);

            }

            public void onServiceDisconnected(ComponentName className) {

                cv.open();

                mContext.unbindService(this);

            }

        };

        if (mContext.bindService(new Intent(mClass.getName()), c, 0)) {

            cv.block(4500);

        }

        return mBinder;

    }

}

    private ISipService mSipService;

    // Will be removed once the SIP service is integrated into framework

    private BinderHelper<ISipService> mBinderHelper;

    /**

     * Creates a manager instance and initializes the background SIP service.

     * Will be removed once the SIP service is integrated into framework.