Add flag to allow hiding size compat restart button

Bug: 318840081
Test: m
Change-Id: I7457b1ca5417954ac6432997023dfb5c1eb6c61e
diff --git a/core/java/android/window/flags/large_screen_experiences_app_compat.aconfig b/core/java/android/window/flags/large_screen_experiences_app_compat.aconfig
index 4b5595f..cbf6367 100644
--- a/core/java/android/window/flags/large_screen_experiences_app_compat.aconfig
+++ b/core/java/android/window/flags/large_screen_experiences_app_compat.aconfig
@@ -43,3 +43,10 @@
   description: "Whether the API PackageManager.USER_MIN_ASPECT_RATIO_APP_DEFAULT is available"
   bug: "310816437"
 }
+
+flag {
+  name: "allow_hide_scm_button"
+  namespace: "large_screen_experiences_app_compat"
+  description: "Whether we should allow hiding the size compat restart button"
+  bug: "318840081"
+}