Refactor: Rely on library type ID to detect audio plugins
Instead of checking the filename to see if a plugin is an audio plugin, use the type identifier ("deng-plugin/audio" for audio plugins).
The audio plugins still use the "audio_" prefix so that AudioDriver can locate them without checking each plugin's type, which requires loading them into memory.
Refactor: Rely on library type ID to detect audio plugins
Instead of checking the filename to see if a plugin is an audio plugin,
use the type identifier ("deng-plugin/audio" for audio plugins).
The audio plugins still use the "audio_" prefix so that AudioDriver can
locate them without checking each plugin's type, which requires loading
them into memory.