Add allocator-v2 extended options to BufferQueue

Bug: 268382490
Test: libgui_test
Change-Id: If43b31eede87cddfcbfe4b24b53c1bafb453ebf2
diff --git a/libs/gui/libgui_flags.aconfig b/libs/gui/libgui_flags.aconfig
index 3864699..a902a8c 100644
--- a/libs/gui/libgui_flags.aconfig
+++ b/libs/gui/libgui_flags.aconfig
@@ -16,3 +16,11 @@
   bug: "310927247"
   is_fixed_read_only: true
 }
+
+flag {
+  name: "bq_extendedallocate"
+  namespace: "core_graphics"
+  description: "Add BQ support for allocate with extended options"
+  bug: "268382490"
+  is_fixed_read_only: true
+}