Merge "Fixed a concurrent modification crash" into nyc-dev

import java.io.FileDescriptor;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

    }

    public void collapseAllGroups() {

        for (NotificationGroup group : mGroupMap.values()) {

        // Because notifications can become isolated when the group becomes suppressed it can

        // lead to concurrent modifications while looping. We need to make a copy.

        ArrayList<NotificationGroup> groupCopy = new ArrayList<>(mGroupMap.values());

        int size = groupCopy.size();

        for (int i = 0; i < size; i++) {

            NotificationGroup group =  groupCopy.get(i);

            if (group.expanded) {

                setGroupExpanded(group, false);

            }