Add audio sharing developer option flag.

Test: compile
Bug: 368401233
Flag: EXEMPT add flag
Change-Id: I58df3df94614780dba4c3785b77c4678b5c23ee6
diff --git a/packages/SettingsLib/aconfig/settingslib.aconfig b/packages/SettingsLib/aconfig/settingslib.aconfig
index 79c3ff9..5a8763f 100644
--- a/packages/SettingsLib/aconfig/settingslib.aconfig
+++ b/packages/SettingsLib/aconfig/settingslib.aconfig
@@ -149,3 +149,13 @@
         purpose: PURPOSE_BUGFIX
     }
 }
+
+flag {
+    name: "audio_sharing_developer_option"
+    namespace: "cross_device_experiences"
+    description: "Gates whether to enable audio sharing developer option"
+    bug: "368401233"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}