Wire-up new flexiglass bouncer to work with existing keyguard codde

Checking in the initial version, this will be refined in follow-up CLs that handle transitions and OnDismiss actions better.

Test: everything builds
Bug: 310005730
Flag: ACONFIG com.android.systemui.compose_bouncer DEVELOPMENT
Change-Id: I5cb304d33ab3e26ad23fdbf64ecf5b58e2abd43f
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 5b21854..f51ed92 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -208,6 +208,13 @@
 }
 
 flag {
+    name: "compose_bouncer"
+    namespace: "systemui"
+    description: "Use the new compose bouncer in SystemUI"
+    bug: "310005730"
+}
+
+flag {
    name: "media_in_scene_container"
    namespace: "systemui"
    description: "Enable media in the scene container framework"