Add flag for retrievable bubbles

Bug: 340337839
Change-Id: Ib34d37961378c5f86fb1bd0adc9e03b483b977df
Test: NA
Flag: NA
diff --git a/libs/WindowManager/Shell/aconfig/multitasking.aconfig b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
index fe68123..8977d5c 100644
--- a/libs/WindowManager/Shell/aconfig/multitasking.aconfig
+++ b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
@@ -71,3 +71,10 @@
     description: "Hides the bubble overflow if there aren't any overflowed bubbles"
     bug: "334175587"
 }
+
+flag {
+    name: "enable_retrievable_bubbles"
+    namespace: "multitasking"
+    description: "Allow opening bubbles overflow UI without bubbles being visible"
+    bug: "340337839"
+}