rka: support non-streaming format

[ami_stuff]

rkau.exe has an option to enable or disable streaming format for encoded files

currently the ffmpeg's decoder is not able to decode files created with this option turned off

./ffmpeg -i 16_33_m_l2_streaming_off.rka
ffmpeg version N-109863-g4113445e9d Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: 
  libavutil      58.  1.100 / 58.  1.100
  libavcodec     60.  2.100 / 60.  2.100
  libavformat    60.  2.100 / 60.  2.100
  libavdevice    60.  0.100 / 60.  0.100
  libavfilter     9.  1.100 /  9.  1.100
  libswscale      7.  0.100 /  7.  0.100
  libswresample   4.  9.100 /  4.  9.100
[rka @ 0x5619d31aa400] Format rka detected only with low score of 1, misdetection possible!
16_33_m_l2_streaming_off.rka: Invalid argument

[Elon Musk]

Non streamed format are evil.