Merge "Return frame period from vsynctracker." into tm-dev

impl::EventThread::GetVsyncPeriodFunction Scheduler::makeGetVsyncPeriodFunction() const {

    return [this](uid_t uid) {

        const Fps refreshRate = holdRefreshRateConfigs()->getActiveMode()->getFps();

        const nsecs_t basePeriod = refreshRate.getPeriodNsecs();

        const auto currentPeriod =

                mVsyncSchedule->getTracker().currentPeriod() ?: refreshRate.getPeriodNsecs();

        const auto frameRate = getFrameRateOverride(uid);

        if (!frameRate.has_value()) {

            return basePeriod;

            return currentPeriod;

        }

        const auto divisor = RefreshRateConfigs::getFrameRateDivisor(refreshRate, *frameRate);

        if (divisor <= 1) {

            return basePeriod;

            return currentPeriod;

        }

        return basePeriod * divisor;

        return currentPeriod * divisor;

    };

}