Merge "AudioTimestamp: Use current time when data pipeline is empty" into qt-dev

                    ALOGV_IF(mPreviousLocation == ExtendedTimestamp::LOCATION_SERVER,

                            "%s(%d): location moved from server to kernel",

                            __func__, mPortId);

                    if (ets.mPosition[ExtendedTimestamp::LOCATION_SERVER] ==

                            ets.mPosition[ExtendedTimestamp::LOCATION_KERNEL]) {

                        // In Q, we don't return errors as an invalid time

                        // but instead we leave the last kernel good timestamp alone.

                        //

                        // If server is identical to kernel, the device data pipeline is idle.

                        // A better start time is now.  The retrograde check ensures

                        // timestamp monotonicity.

                        const int64_t nowNs = systemTime();

                        ALOGD("%s(%d) device stall, using current time %lld",

                                __func__, mPortId, (long long)nowNs);

                        timestamp.mTime = convertNsToTimespec(nowNs);

                    }

                }

                // We update the timestamp time even when paused.