Moved and renamed effect API header files

Moved specific effect header files to
system/media/audio_effects/include/audio_effects
and renamed to lower case (effect_xxx.h).

Change-Id: Icfc2264bfd013cab0395d7e310ada636b9fe3621
diff --git a/media/libeffects/visualizer/Android.mk b/media/libeffects/visualizer/Android.mk
index 3a0f438..dff585f 100644
--- a/media/libeffects/visualizer/Android.mk
+++ b/media/libeffects/visualizer/Android.mk
@@ -23,8 +23,8 @@
 endif
 
 LOCAL_C_INCLUDES := \
-	$(call include-path-for, graphics corecg)
-
+	$(call include-path-for, graphics corecg) \
+	system/media/audio_effects/include
 
 
 include $(BUILD_SHARED_LIBRARY)