Spatializer: Disable head tracking for stereo spatialization

Do not enable head tracking if all the spatialized tracks are stereo.

Flag: EXEMPT bugfix
Test: manual spatial audio tests
Test: atest spatializer_tests
Bug: 356953811
Change-Id: I75e2cb63ee4c5c5bfba628802198d056fd30e216
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index f414862..e598897 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -477,7 +477,7 @@
 
         sp<AudioPlaybackClient> client =
                 new AudioPlaybackClient(attr, output, attributionSource, session,
-                    portId, selectedDeviceId, stream, isSpatialized);
+                    portId, selectedDeviceId, stream, isSpatialized, config.channel_mask);
         mAudioPlaybackClients.add(portId, client);
 
         _aidl_return->output = VALUE_OR_RETURN_BINDER_STATUS(