Added API to query and configure effects supporting auxiliary channels.
An auxiliary channel contains an additional audio signal helping in the
processing of the main channel. An example is a dual mic noise suppressor
were the main channel contains the signal from the main mic and the aux channel
containss the signal from the sub mic.
Change-Id: Ibb7a19d7f492720ebad0be45f78f996e0beba272
Renamed audio effect library interface command for audio format
configuration from EFFECT_CMD_CONFIGURE to EFFECT_CMD_SET_CONFIG.
This makes the naming more consistent with other exixsting commands
and allow adding new a command to get the configuration (EFFECT_CMD_GET_CONFIG).
Same change for reverse channel configuration renamed from
EFFECT_CMD_CONFIGURE_REVERSE to EFFECT_CMD_SET_CONFIG_REVERSE.
Change-Id: I1cc462aa50e58ceec900b3da9bd3873d2d098098
Moved and renamed media/EffectApi.h to hardware/audio_effect.h
Modified the effect library API to expose a library info structure
containing an interface functions table.
Also removed enums for audio channels, audio format and devices
from effect API and use values from system/audio.h instead.
Change-Id: I32fd752e449337410115121c1c60c699d95247c2
