Revert "remove aac encoder. breaks camcorder"

Maybe it doesn't break camcorder

This reverts commit 63a62381e2ab4a3414342615425b4a90119b2ae7.
Revert "sepolicy: update audio"

This reverts commit 1de5c21434bc0e2e3edbdb24c240e4e7cb48d9d8.