audio: Remove audio effects config from audio HAL VAPEX

The audio effects HAL config can vary between different
CF "flavors" and thus must not belong to VAPEX. This is
consistent with handling of audio policy configuration files.

Bug: 318423731
Test: run `atest audioeffect_tests` on cf_x86_64_auto-trunk_staging-userdebug
Change-Id: I0f4ee9a44a3426934f6a055fc8c9ce74a8db78fc