Merge "Prevent ConcurrentModificationException while accessing mTunableLookup."

import com.android.systemui.statusbar.phone.StatusBarIconController;

import com.android.systemui.util.leak.LeakDetector;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Set;

import java.util.concurrent.ConcurrentHashMap;

import javax.inject.Inject;

import javax.inject.Singleton;

    // Map of Uris we listen on to their settings keys.

    private final ArrayMap<Uri, String> mListeningUris = new ArrayMap<>();

    // Map of settings keys to the listener.

    private final HashMap<String, Set<Tunable>> mTunableLookup = new HashMap<>();

    private final ConcurrentHashMap<String, Set<Tunable>> mTunableLookup =

            new ConcurrentHashMap<>();

    // Set of all tunables, used for leak detection.

    private final HashSet<Tunable> mTunables = LeakDetector.ENABLED ? new HashSet<>() : null;

    private final Context mContext;