Set volume for output when effect is enabled/disabled.

Even though effect module has "EFFECT_FLAG_VOLUME_CTRL" flag,
there is some case where volume setting is not sent to offload thread.
That leads to sudden increase of audio volume or too low volume.
This change is to support delegation of volume control completely
for offload audio effect.

Bug: 37443095
Test: Enable/Disable Audio effects during offload playback
Change-Id: I7033071edc99fadc519efd7adc895dc10f7b9d86