Add USB audio support

Change-Id: I0a9d5a7879bf0873bf0078fc8af2fb4047768ab7
Signed-off-by: Mike Lockwood <lockwood@google.com>
diff --git a/device.mk b/device.mk
index e8424b7..25731f6 100644
--- a/device.mk
+++ b/device.mk
@@ -148,7 +148,8 @@
 
 PRODUCT_PACKAGES += \
     audio.primary.manta \
-    audio.a2dp.default
+    audio.a2dp.default \
+	audio.usb.default
 
 PRODUCT_PACKAGES += \
     power.manta