Add aconfig flag for gesture nav handling on connected displays.

Flag: EXEMPT adding the flag
Bug: 382130680
Bug: 398881237
Test: ran launcher
Change-Id: Ic39582bd2f20e7d2bbf15bd4c23ae11cf4d73182
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index 4f5b1a0..cc746eb 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -629,3 +629,10 @@
   description: "Enable Alt + Tab KQS view to show apps in flattened structure"
   bug: "382769617"
 }
+
+flag {
+  name: "enable_gesture_nav_on_connected_displays"
+  namespace: "lse_desktop_experience"
+  description: "Enables gesture navigation handling on connected displays"
+  bug: "382130680"
+}