Add flag for screenOff/addUdfpsView bug fix

Flag: ACONFIG com.android.systemui.udfps_view_performance DEVELOPMENT
Bug: 225183106
Test: n/a
Change-Id: Ia16fa074fbdc93f68103770404750731ac844cb8
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index c2072ac..3e22c16 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -15,6 +15,16 @@
 }
 
 flag {
+   name: "udfps_view_performance"
+   namespace: "systemui"
+   description: "Decrease screen off blocking calls by waiting until the device is finished going to sleep before adding the udfps view."
+   bug: "225183106"
+   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."