Fix Highpass filtering for ParamUpmix
ParamUpmix which operates at 7.1.4 160kbps is doing HP filtering after ParamUpmix decoding, it should be moved to before, aligning with other modes.
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ParamUpmix which operates at 7.1.4 160kbps is doing HP filtering after ParamUpmix decoding, it should be moved to before, aligning with other modes.