Remove dependencies on hardware/audio_effects.h

Also remove some outstanding dependencies on hardware/audio.h.

Most of the time, only constants and structs from audio_effects.h
are used, and no actual calls into HAL are made. Move these
definitions into system/audio_effect.h, and generate constants
from TREBLE HAL definition.

Test: make

Change-Id: Ib28eca67f40bf8285d3352407f1ee82b6c77ad54
6 files changed