Do not forward volume to secondary tracks

We need to define rules how the volume is managed by the secondary patch
tracks. For now we keep the unattenuated volume for the patch tracks and
do not forward any changes.

Created b/388241142 for tracking the rules for volume management when
capturing audio.

Flag: EXEMPT bugfix
Test: atest AudioPlaybackCaptureTest --iterations 10
Bug: 381505666
Change-Id: I8d2e4a6def203876075071b6584b4c7f9ff1ca3d