Fix the build

Change-Id: I2169a3d26f4e35e5cfa35a1264175aab6ac4db41
diff --git a/services/audiopolicy/AudioPolicyManager.h b/services/audiopolicy/AudioPolicyManager.h
index 0887fcf..8a631ba 100644
--- a/services/audiopolicy/AudioPolicyManager.h
+++ b/services/audiopolicy/AudioPolicyManager.h
@@ -184,7 +184,7 @@
 
             DeviceDescriptor(audio_devices_t type) :
                                  mType(type), mAddress(""),
-                                 mChannelMask(AUDIO_CHANNEL_NONE), mId(0) {}
+                                 mChannelMask(0), mId(0) {}
 
             status_t dump(int fd, int spaces) const;
             static void dumpHeader(int fd, int spaces);