Migrate ENABLE_SPLIT_FROM_FULLSCREEN_WITH_KEYBOARD_SHORTCUTS to aconfig

Bug: 270394122
Test: N/A
Change-Id: I9bacd906099518b4a4c43a9f80ab0c753beac89a
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index fa76453..5689c8a 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -62,3 +62,10 @@
     description: "Enables taskbar pinning to allow user to switch between transient and persistent taskbar flavors."
     bug: "270396583"
 }
+
+flag {
+    name: "enable_split_from_fullscreen_with_keyboard_shortcuts"
+    namespace: "launcher"
+    description: "Enables initiating split from a fullscreen app using keyboard shortcuts"
+    bug: "270394122"
+}