Set "low delay" decoder flag
Set "low delay" decoder flag

I don't really know the concrete benefits, but scrcpy definitely wants
low delay decoding.

Suggested-by: François Cartegnie <310f1db38de807b64012eea4bc0bd91d9d7c874e@free.fr>

Genymobile/scrcpy,Genymobile/scrcpy,Genymobile/scrcpy