Merge "MediaMuxer:Include info to specify last sample duration" into rvc-dev am: 11b93f6f

     * the right tracks. Also, it needs to make sure the samples for each track

     * are written in chronological order (e.g. in the order they are provided

     * by the encoder.)</p>

     * <p> For MPEG4 media format, the duration of the last sample in a track can be set by passing

     * an additional empty buffer(bufferInfo.size = 0) with MediaCodec.BUFFER_FLAG_END_OF_STREAM

     * flag and a suitable presentation timestamp set in bufferInfo parameter as the last sample of

     * that track.  This last sample's presentation timestamp shall be a sum of the presentation

     * timestamp and the duration preferred for the original last sample.  If no explicit

     * END_OF_STREAM sample was passed, then the duration of the last sample would be the same as

     * that of the sample before that.</p>

     * @param byteBuf The encoded sample.

     * @param trackIndex The track index for this sample.

     * @param bufferInfo The buffer information related to this sample.