Don't remove elements while using foreach

import java.util.Collections;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Objects;

        // Check to see if we can reuse any of the calls that are waiting to disconnect.

        // See {@link Call#abort} and {@link #onCanceledViaNewOutgoingCall} for more information.

        Call reusedCall = null;

        for (Call pendingCall : mPendingCallsToDisconnect) {

        for (Iterator<Call> callIter = mPendingCallsToDisconnect.iterator(); callIter.hasNext();) {

            Call pendingCall = callIter.next();

            if (reusedCall == null && areHandlesEqual(pendingCall.getHandle(), handle)) {

                mPendingCallsToDisconnect.remove(pendingCall);

                callIter.remove();

                Log.i(this, "Reusing disconnected call %s", pendingCall);

                reusedCall = pendingCall;

            } else {