visualizer: do not apply calibration on audio routed to afe proxy

When compress offload playback is active, if the Visualizer effect
is enabled, decoded PCM audio is routed to AFE Proxy port and
read from it by the Visualizer wrapper library. When audio is routed
to proxy port, current output device specific calibration is also
being applied which is not desired.
Avoid this by sending default audio calibration i.e. no post-processing
to be applied the data.

Change-Id: Id576c4ed7bbb482683074e3e33aa5760b7597d37
diff --git a/visualizer/Android.mk b/visualizer/Android.mk
index 393eec3..87d4987 100644
--- a/visualizer/Android.mk
+++ b/visualizer/Android.mk
@@ -24,6 +24,7 @@
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \
 	liblog \
+	libdl \
 	libtinyalsa
 
 LOCAL_MODULE_RELATIVE_PATH := soundfx