Resolve "empty parameter band in DirAC at high bitrates" [non-BE][non-io][split-non-be]

• Related issues: #973 (closed)
• Requested reviewers: @tyagiri

Reason why this change is needed

one parameter band has no MDFT bins

Description of the change

code only 11 parameter bands or disable grouping of two highest bands

Affected operating points

• SBA at 384 and 512 kbps
• bitstream is not BE and not BC
• output is not BE

Related to #973 (closed)