Revert "audiopolicy: moves Stream Volume Curves to Engine"

This reverts commit 539311942bdbac65fbf7f2fc1390b6b9ef850a1b.

Bug: 125937703
Test: make
diff --git a/services/audiopolicy/engineconfigurable/src/Engine.cpp b/services/audiopolicy/engineconfigurable/src/Engine.cpp
index 89a1694..719ef01 100644
--- a/services/audiopolicy/engineconfigurable/src/Engine.cpp
+++ b/services/audiopolicy/engineconfigurable/src/Engine.cpp
@@ -113,7 +113,7 @@
                                        const audio_stream_type_t &profile)
 {
     if (setPropertyForKey<audio_stream_type_t, audio_stream_type_t>(stream, profile)) {
-        switchVolumeCurve(profile, stream);
+        getApmObserver()->getVolumeCurves().switchVolumeCurve(profile, stream);
         return true;
     }
     return false;