audio: rename virtualizer stage to spatializer (2)

Update after renaming in system/media includes.

Bug: 188502620
Test: make
Change-Id: I12ed9fbcf2064190d3c59f8003b2d74c07c09a11
diff --git a/services/audiopolicy/service/Spatializer.h b/services/audiopolicy/service/Spatializer.h
index b177953..f0ab605 100644
--- a/services/audiopolicy/service/Spatializer.h
+++ b/services/audiopolicy/service/Spatializer.h
@@ -23,7 +23,7 @@
 #include <android/media/SpatializationLevel.h>
 
 #include <media/AudioEffect.h>
-#include <system/audio_effects/effect_virtualizer_stage.h>
+#include <system/audio_effects/effect_spatializer.h>
 
 
 namespace android {