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e163fe6949
In 2.11.2 to 2.11.5, we considered all AAC streams as consisting only of sync samples. In 2.11.6+, we considered no AAC streams as consisting of sync samples, because the property is not guaranteed specifically for xHE-AAC. This will have caused a small regression is seek speed for some types of media. This change brings back the optimization for AAC, specifically excluding only xHE-AAC (and cases where we don't know what type of AAC we're dealing with). PiperOrigin-RevId: 328950697