Apply over-expansion to clipping bounds

Fixes: 288553572
Test: atest SystemUITests
Flag: com.android.systemui.notification_over_expansion_clipping_fix
Change-Id: I6ae1671394bad49951cea590db87d3a62e9d3fae
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index c979d05..b214a5c 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -61,6 +61,16 @@
 }
 
 flag {
+   name: "notification_over_expansion_clipping_fix"
+   namespace: "systemui"
+   description: "fix NSSL clipping when over-expanding; fixes split shade bug."
+   bug: "288553572"
+   metadata {
+        purpose: PURPOSE_BUGFIX
+   }
+}
+
+flag {
     name: "notification_async_group_header_inflation"
     namespace: "systemui"
     description: "Inflates the notification group summary header views from the background thread."