Use SR framesize signalling in RTP ToC for post-renderer initialization

* Add a preview of the RTP stream to extract the codec, and framesize
  fields as reported in the RTP SR ToC byte
* Override the user provided renderer framesize to codec framesize in
  rtp cases to prevent bitstream read errors due to unparsed padding in
  the end of ISAR bitstream.
* Code formatting changes
* Eof early exit without throwing error in rtp for post renderer
* Remove the external SR CodecFrameSize from RTP API SR CodecFrameSize
  read from RTP stream, hence no need to be set externally.

Signed-off-by: Ripinder Singh <ripinder.singh@dolby.com>