Merge "r_submix: keep the signed value for offset calculation in AIDL...

    // recording (including this call): it's converted to usec and compared to how long we've been

    // recording for, which gives us how long we must wait to sync the projected recording time, and

    // the observed recording time.

    const size_t projectedVsObservedOffsetUs = static_cast<size_t>(

    const int projectedVsObservedOffsetUs =

            std::roundf((readCounterFrames * MICROS_PER_SECOND / mStreamConfig.sampleRate) -

                        recordDurationUs.count()));

                        recordDurationUs.count());

    LOG(VERBOSE) << __func__ << ": record duration " << recordDurationUs.count()

                 << " microseconds, will wait: " << projectedVsObservedOffsetUs << " microseconds";