Add aconfig flag for fixing the transparent group header

Add aconfig flag for fixing the transparent group header issue when the
 async header inflation is enabled, dark mode just changed, and the
 group is automate-generated.

Bug: 340161724
Test: n/a
Flag: com.android.systemui.notification_transparent_header_fix
Change-Id: Iaf1a59e047b1a284fdd4f50be7811c519a48bac9
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 0fdcc7a..c1d1bd4 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -146,6 +146,16 @@
 }
 
 flag {
+   name: "notification_transparent_header_fix"
+   namespace: "systemui"
+   description: "fix the transparent group header issue for async header inflation."
+   bug: "340161724"
+   metadata {
+        purpose: PURPOSE_BUGFIX
+   }
+}
+
+flag {
    name: "pss_app_selector_abrupt_exit_fix"
    namespace: "systemui"
    description: "Fixes the app selector abruptly disappearing without an animation, when the"