Fix theoretical memory leak in mConfigEvents

AudioFlinger::ThreadBase::~ThreadBase()

{

    // mConfigEvents should be empty, but just in case it isn't, free the memory it owns

    for (size_t i = 0; i < mConfigEvents.size(); i++) {

        delete mConfigEvents[i];

    }

    mConfigEvents.clear();

    mParamCond.broadcast();

    // do not lock the mutex in destructor

    releaseWakeLock_l();

                Vector<String8>         mNewParameters;

                status_t                mParamStatus;

                // vector owns each ConfigEvent *, so must delete after removing

                Vector<ConfigEvent *>     mConfigEvents;

                // These fields are written and read by thread itself without lock or barrier,