Merge "Use thread safe set for adapter set" into lmp-dev

import com.android.internal.telecomm.RemoteServiceCallback;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.Collections;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

import java.util.concurrent.ConcurrentHashMap;

/**

 * Provides methods for IConnectionService implementations to interact with the system phone app.

 * @hide

 */

final class ConnectionServiceAdapter implements DeathRecipient {

    private final Set<IConnectionServiceAdapter> mAdapters = new HashSet<>();

    private final Set<IConnectionServiceAdapter> mAdapters = Collections.newSetFromMap(

            new ConcurrentHashMap<IConnectionServiceAdapter, Boolean>(2));

    ConnectionServiceAdapter() {

    }