Fix crash during checks for layer ID of ALF APS
When method checkAlfNaluTidAndPicTid() is called for a Slice object pointers to SPS and VPS are not yet set.
Methods setSPS() and setVPS() are called later for that Slice object.
Since IDs of SPS and VPS are known at this point, SPS and VPS can be found in ParameterSetManager.