[SB][Screen Chips] Add a flag for the screen sharing chips.

Bug: 332662551
Test: N/A
Flag: ACONFIG com.android.systemui.status_bar_screen_sharing_chips DISABLED

Change-Id: Iebceb6f2d49fe82e26a9cc815e361558895676f3
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 582b6a1..4a4ff59 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -348,6 +348,14 @@
 }
 
 flag {
+    name: "status_bar_screen_sharing_chips"
+    namespace: "systemui"
+    description: "Show chips on the left side of the status bar when a user is screen sharing, "
+        "recording, or casting"
+    bug: "332662551"
+}
+
+flag {
     name: "compose_bouncer"
     namespace: "systemui"
     description: "Use the new compose bouncer in SystemUI"