Add property for enabling stereo spatialization

Bug: 323223919
Test: manual
Change-Id: I49d12bfc878ec63d8fe036880033e1c309961430
diff --git a/private/property_contexts b/private/property_contexts
index aa15633..e0cbb4d 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -410,6 +410,9 @@
 # Boolean property used in AudioService to configure whether
 # to enable head tracking for spatial audio
 ro.audio.headtracking_enabled u:object_r:audio_config_prop:s0 exact bool
+# Boolean property used in AudioPolicyManager to configure whether
+# to enable spatialization for stereo channel mask
+ro.audio.stereo_spatialization_enabled u:object_r:audio_config_prop:s0 exact bool
 
 # Boolean property used in UsbAlsaManager to decide if only one or multiple
 # USB devices can be connected to audio system at a certain time