Fix concurrent modifcation exception (issue 11234805)

import android.graphics.drawable.Drawable;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map.Entry;

/**

 * Cache of application icons.  Icons can be made from any thread.

     */

    public void flushInvalidIcons(DeviceProfile grid) {

        synchronized (mCache) {

            for (ComponentName cn : mCache.keySet()) {

                final CacheEntry e = mCache.get(cn);

            Iterator<Entry<ComponentName, CacheEntry>> it = mCache.entrySet().iterator();

            while (it.hasNext()) {

                final CacheEntry e = it.next().getValue();

                if (e.icon.getWidth() != grid.iconSizePx || e.icon.getHeight() != grid.iconSizePx) {

                    mCache.remove(cn);

                    it.remove();

                }

            }

        }