Initialize volume level of volume control effect as lowest level.

When a volume control effect is attached, set the volume as lowest level
for safer ramping.

Bug: 242159880
Test: repo steps from the bug
Change-Id: I084bb99106e7e06232db107b8e288bf5416d26cc
Merged-In: I084bb99106e7e06232db107b8e288bf5416d26cc