[Audiosharing] Add flag for volume dialog fix in audio sharing.

Test: compile
Bug: 336716411
Flag: EXEMPT add com.android.settingslib.flags.volume_dialog_broadcast_fix
Change-Id: I3968e20cd2b2b5401758b005468aba0e73340036
diff --git a/packages/SettingsLib/aconfig/settingslib.aconfig b/packages/SettingsLib/aconfig/settingslib.aconfig
index 8666584..38c871c 100644
--- a/packages/SettingsLib/aconfig/settingslib.aconfig
+++ b/packages/SettingsLib/aconfig/settingslib.aconfig
@@ -92,3 +92,13 @@
         purpose: PURPOSE_BUGFIX
     }
 }
+
+flag {
+    name: "volume_dialog_audio_sharing_fix"
+    namespace: "cross_device_experiences"
+    description: "Gates whether to show separate volume bars during audio sharing"
+    bug: "336716411"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}