Switch clipboard shared transitions flag to aconfig

Bug: 360843770
Test: manual (with flag on and off)
Flag: com.android.systemui.clipboard_shared_transitions
Change-Id: I6a1595740f39d0be1dd1dbd9d4b9b84c17fcf5e3
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 7c0db8d..669aca9 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -541,6 +541,16 @@
 }
 
 flag {
+    name: "clipboard_shared_transitions"
+    namespace: "systemui"
+    description: "Show shared transitions from clipboard"
+    bug: "360843770"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}
+
+flag {
     name: "clipboard_image_timeout"
     namespace: "systemui"
     description: "Wait for clipboard image to load before showing UI"