Revert "crosvm: Remove obsoleted vmlauncher_app usage"

This reverts commit 43e9dbacb487a45c862e098d03fba11be2fe31e1.

Reason for revert: broke b/399981318

Change-Id: Ib1bc96a5a760d162bcf01e5cd4568c4111106882
diff --git a/private/vmlauncher_app.te b/private/vmlauncher_app.te
index 2007177..ef34c31 100644
--- a/private/vmlauncher_app.te
+++ b/private/vmlauncher_app.te
@@ -14,7 +14,7 @@
 allow vmlauncher_app fsck_exec:file { r_file_perms execute execute_no_trans };
 allow vmlauncher_app crosvm:fd use;
 allow vmlauncher_app crosvm_tmpfs:file { map read write };
-allow vmlauncher_app crosvm_exec:file r_file_perms;
+allow vmlauncher_app crosvm_exec:file rx_file_perms;
 
 allow vmlauncher_app privapp_data_file:sock_file { create unlink write getattr };