Fix race when sending CSD attenuation value

Replacing the message for CSD attenuation when calling from
applyAllVolumes can overwrite the stream type/device that is necessary
to compute the attenuation. Do not replace the message and only apply
the attenuation for STREAM_MUSIC

Test: csd logs
Flag: EXEMPT bugfix
Bug: 380717558
Change-Id: Ibc4a8be2459fe51bc3389f3fdd58f09eaa2d0618