Add flag for enabling stereo channel spatialization

Bug: 303920722
Test: manual
Change-Id: I5dca25b5a13a9ee963398c1412c65dcbcc9f3f17
diff --git a/media/audio/aconfig/Android.bp b/media/audio/aconfig/Android.bp
index 1c1ac0e..121b293 100644
--- a/media/audio/aconfig/Android.bp
+++ b/media/audio/aconfig/Android.bp
@@ -43,6 +43,18 @@
     name: "com.android.media.audio-aconfig-cc",
     aconfig_declarations: "com.android.media.audio-aconfig",
     defaults: ["audio-aconfig-cc-defaults"],
+    double_loadable: true,
+    host_supported: true,
+    product_available: true,
+    vendor_available: true,
+    // TODO(b/316909431) native_bridge_supported: true,
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.media",
+        "com.android.media.swcodec",
+        "com.android.btservices",
+    ],
+    min_sdk_version: "29",
 }
 
 cc_aconfig_library {
diff --git a/media/audio/aconfig/audio.aconfig b/media/audio/aconfig/audio.aconfig
index 73cb8ca..388e5e0 100644
--- a/media/audio/aconfig/audio.aconfig
+++ b/media/audio/aconfig/audio.aconfig
@@ -42,3 +42,10 @@
     description: "Enable spatializer offload"
     bug: "307842941"
 }
+
+flag {
+    name: "stereo_spatialization"
+    namespace: "media_audio"
+    description: "Enable stereo channel mask for spatialization."
+    bug: "303920722"
+}