Only set initial volume to 0 for the effect that does volume control.

When the effect for doing volume control is changed, set volume for the
old one as full level and the new one as 0 for safe ramping.

Bug: 280641126
Test: repo steps in the bug
Change-Id: I0f843c8deae907f8584dc18d025ab499319784b5
Merged-In: I0f843c8deae907f8584dc18d025ab499319784b5