Add flexible split flag

Test: None
Bug: 349828130
Flag: EXEMPT adding flag
Change-Id: I4ce43bacf607ce726eec5abc820d781ba1a36ea5
diff --git a/libs/WindowManager/Shell/aconfig/multitasking.aconfig b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
index 470b7a2..df1a98c 100644
--- a/libs/WindowManager/Shell/aconfig/multitasking.aconfig
+++ b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
@@ -145,3 +145,10 @@
    description: "Enable an option to move bubbles to fullscreen"
    bug: "363326492"
 }
+
+flag {
+    name: "enable_flexible_split"
+    namespace: "multitasking"
+    description: "Enables flexibile split feature for split screen"
+    bug: "349828130"
+}