Add USB audio HAL to the build

Change-Id: I03847bc90ec009f06bce387088184165949dd39d
Signed-off-by: Mike Lockwood <lockwood@google.com>
diff --git a/device_base.mk b/device_base.mk
index 5eb66ce..c5aa2f3 100644
--- a/device_base.mk
+++ b/device_base.mk
@@ -78,6 +78,7 @@
     lights.stingray \
     audio.primary.stingray \
     audio.a2dp.default \
+    audio.usb.default \
     audio_policy.stingray \
     librs_jni \
     make_ext4fs \