Resolve "Wrong render frame size reported when decoding to split rendering configurations"

Reason why this change is needed

The configuration printout from the decoder always reports render frame size of 20 ms when outputting to split rendering configs, irrespective of the actual value set via the -fr option. The bug seems to only affect the printout - the ISAR file written by the decoder has a frame size matching the value given to the -fr option. This can be verified with ./scripts/split_rendering/isar_bstool.py

Description of the change

Move the config info printout after loading renderer config info from external file.

Affected operating points

BE.

Closes #1550

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