[Fill Dialog Improvements] Setup aconfig flag

Flag setup.

Bug: 377868687
Flag: android.service.autofill.fill_dialog_improvements_impl
Test: N/A. Flag def only.
Change-Id: Ib7655d92faa924d5d188077466dd9b3bf8ed34eb
diff --git a/services/autofill/features.aconfig b/services/autofill/features.aconfig
index bd46deb..a077234 100644
--- a/services/autofill/features.aconfig
+++ b/services/autofill/features.aconfig
@@ -24,6 +24,14 @@
 }
 
 flag {
+    name: "fill_dialog_improvements_impl"
+    is_exported: true
+    namespace: "autofill"
+    description: "Improvements for Fill Dialog for non-api changes"
+    bug: "336223371"
+}
+
+flag {
     name: "fill_dialog_improvements"
     is_exported: true
     namespace: "autofill"