Add close_to_square_config_includes_status_bar flag

This is a feature flag to control the effort of eliminating letterbox
cases for close-to-square displays. Additional config flag and app
compat flag will be introduced to achieve the full policy control.

Test: m services.core.flags-java
Test: m services.core.unboosted
Test: m dist
Bug: 291870756
Change-Id: Ic49a2148bd30b19bd4f56eebf15fa4ffc925947d
diff --git a/core/java/android/window/flags/windowing_frontend.aconfig b/core/java/android/window/flags/windowing_frontend.aconfig
index 7a4c5bc..7c931cd 100644
--- a/core/java/android/window/flags/windowing_frontend.aconfig
+++ b/core/java/android/window/flags/windowing_frontend.aconfig
@@ -6,3 +6,10 @@
   description: "Make nav bar color transparent by default when targeting SDK 35 or greater"
   bug: "232195501"
 }
+
+flag {
+  name: "close_to_square_config_includes_status_bar"
+  namespace: "windowing_frontend"
+  description: "On close to square display, when necessary, configuration includes status bar"
+  bug: "291870756"
+}