Create a flag for cross-user suspension.

Bug: 263464464
Test: none
Change-Id: I1229a133f9a02468733e1338fde2453c726e0090

core/java/android/app/admin/flags/flags.aconfig

@@ -19,4 +19,11 @@ flag {
   namespace: "enterprise"
   description: "Add feature to track required changes for enabled V2 of auto-capturing of onboarding bug reports."
   bug: "302517677"
-}
\ No newline at end of file
+}
+
+flag {
+  name: "cross_user_suspension_enabled"
+  namespace: "enterprise"
+  description: "Allow holders of INTERACT_ACROSS_USERS_FULL to suspend apps in different users."
+  bug: "263464464"
+}