FAAD2 2.11.4

[ Logan Russell ]

• Fix the fixed-point SBR envelope estimate

[ Nils Schimmelmann ]

• Fix PNS decoding window offset clamping for short sequences
• Add sample-accurate gapless MP4 container trimming (elst atom and iTunSMPB metadata support, including SBR decoder delay adjustment)
• Fix -g/--no-gapless CLI option parsing and metadata tag handling
• Fix mono HE-AAC channel counts and PS signaling for HE-AAC v2 MP4 files