Notification Minimalism Prototype

When the flag is enabled:
* Cap notifications on lock screen at 1, excluding the UMO
* Act as if LOCK_SCREEN_SHOW_ONLY_UNSEEN_NOTIFICATIONS is Enabled

Bug: 330387368
Test: atest SystemUITests
Flag: ACONFIG com.android.systemui.notification_minimalism_prototype DEVELOPMENT
Change-Id: Ibc47fd1858b62abcab557198ebaf5f2f4587bf11
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 8da5021..21af1a2 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -25,6 +25,16 @@
 }
 
 flag {
+   name: "notification_minimalism_prototype"
+   namespace: "systemui"
+   description: "Prototype of notification minimalism; the new 'Intermediate' lockscreen customization proposal."
+   bug: "330387368"
+   metadata {
+        purpose: PURPOSE_BUGFIX
+   }
+}
+
+flag {
    name: "notification_view_flipper_pausing"
    namespace: "systemui"
    description: "Pause ViewFlippers inside Notification custom layouts when the shade is closed."