[1/n] Add flag for VDM full-screen API

Flag: com.android.window.flags.vdm_force_app_universal_resizable_api
Bug: 372848702
Bug: 337894172
Test: m
Change-Id: I586b0f517c3ec9876035ffb50b3a077931f443f6
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 235ba3a..7ad14b0 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
@@ -142,4 +142,12 @@
   description: "Whether the declarative compat UI framework is enabled"
   bug: "270361630"
   is_fixed_read_only: true
+}
+
+flag {
+  name: "vdm_force_app_universal_resizable_api"
+  namespace: "large_screen_experiences_app_compat"
+  description: "Whether the API for forcing apps to be universal resizable on virtual display is available"
+  bug: "372848702"
+  is_exported: true
 }
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