Merge "Unlink death recipient when clearing up SignalStrengthUpdateRequest" into tm-qpr-dev

import java.util.Arrays;

import java.util.Iterator;

import java.util.List;

import java.util.NoSuchElementException;

import java.util.Set;

import java.util.TreeSet;

import java.util.concurrent.TimeUnit;

                while (it.hasNext()) {

                    SignalRequestRecord srr = it.next();

                    if (srr.mRequest.getLiveToken().equals(record.mRequest.getLiveToken())) {

                        try {

                            srr.mRequest.getLiveToken().unlinkToDeath(srr, 0);

                        } catch (NoSuchElementException ignored) {

                            // Either never linked or has already unlinked, ignore anyway

                        }

                        it.remove();

                    }

                }