Return DEAD_OBJECT if getTimestamp cannot restore track

     *                     overall hardware latency to physical output. In WOULD_BLOCK cases,

     *                     one might poll again, or use getPosition(), or use 0 position and

     *                     current time for the timestamp.

     *         DEAD_OBJECT if AudioFlinger dies or the output device changes and

     *                     the track cannot be automatically restored.

     *                     The application needs to recreate the AudioTrack

     *                     because the audio device changed or AudioFlinger died.

     *                     This typically occurs for direct or offload tracks

     *                     or if mDoNotReconnect is true.

     *         INVALID_OPERATION  if called on a FastTrack, wrong state, or some other error.

     *

     * The timestamp parameter is undefined on return, if status is not NO_ERROR.

    }

    if (mCblk->mFlags & CBLK_INVALID) {

        restoreTrack_l("getTimestamp");

        const status_t status = restoreTrack_l("getTimestamp");

        if (status != OK) {

            // per getTimestamp() API doc in header, we return DEAD_OBJECT here,

            // recommending that the track be recreated.

            return DEAD_OBJECT;

        }

    }

    // The presented frame count must always lag behind the consumed frame count.