Add flag for only 2 app flexible split

Flag: EXEMPT adding flag
Change-Id: Ia848689c48af88ce4b7619bd5a50abbfa5c93bfd
diff --git a/libs/WindowManager/Shell/aconfig/multitasking.aconfig b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
index 63a2880..cf0a975 100644
--- a/libs/WindowManager/Shell/aconfig/multitasking.aconfig
+++ b/libs/WindowManager/Shell/aconfig/multitasking.aconfig
@@ -156,6 +156,13 @@
 }
 
 flag {
+    name: "enable_flexible_two_app_split"
+    namespace: "multitasking"
+    description: "Enables only 2 app 90:10 split"
+    bug: "349828130"
+}
+
+flag {
     name: "enable_flexible_split"
     namespace: "multitasking"
     description: "Enables flexibile split feature for split screen"