alsa_sound: Fix audio over Miracast

 * We're not using QC's proprietary WFD solution, so pick the remote
   submix instead of the proxy.

Change-Id: Ie32a4591a27f17e2a1d0b87b5f5a7b8b320ff169
diff --git a/alsa_sound/AudioPolicyManagerALSA.cpp b/alsa_sound/AudioPolicyManagerALSA.cpp
index 9335332..f6970ff 100644
--- a/alsa_sound/AudioPolicyManagerALSA.cpp
+++ b/alsa_sound/AudioPolicyManagerALSA.cpp
@@ -1635,7 +1635,7 @@
         uint32_t device2 = AUDIO_DEVICE_NONE;
         if (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_SPEAKER) {
             if (strategy != STRATEGY_SONIFICATION) {
-#ifdef QCOM_PROXY_DEVICE_ENABLED
+#ifdef QCOM_WFD_ENABLED
                 // no sonification on WFD sink
                 device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_PROXY;
 #else