Introducing the MSDL flag for SysUI surfaces.

Change-Id: Ie83ccbd0987077242091c4e3f6b56db9504dd5f4
Test: presubmit
Flag: NONE introducing flag
Bug: 352600066
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index b580eb1..71f5511 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1180,3 +1180,10 @@
     purpose: PURPOSE_BUGFIX
   }
 }
+
+flag {
+  name: "msdl_feedback"
+  namespace: "systemui"
+  description: "Enables MSDL feedback in SysUI surfaces."
+  bug: "352600066"
+}
\ No newline at end of file