Revert "Kill audio_effects.conf"

This reverts commit cb7ccfe5f9ac26e3ea6609d5c6ab5a017e0173a7.

(cherry picked from commit a82ab59983669cf73013f2eb7e01a6a4c0b39624)
(cherry picked from commit 782d8914d0f3a81d8bdd4c17d0252da1509744d4)
Stereo -- BUT WIDER

This will break DSPManager at runtime if a ROM doesn't have stereowide-supporting DSPManager

Change-Id: I9eabcb6a7656c83ada8a7dd01b61ec32c4ad5b08
(cherry picked from commit 53f916ac37b50e97670ef76c40cfd1a659223265)
(cherry picked from commit d9824b7505bc36f496128b16d57355f54518dbab)