Allow dexopt_chroot_setup to mount and unmount binfmt_miscfs.

Some devices have /proc/sys/fs/binfmt_misc. The reason we need to mount
and unmount it is stated in the comments above the SELinux rules.

Bug: 349576449
Change-Id: I321324c599bb163092bbc3bbea22bf7669e85133
diff --git a/private/dexopt_chroot_setup.te b/private/dexopt_chroot_setup.te
index 4267d09..4a964fd 100644
--- a/private/dexopt_chroot_setup.te
+++ b/private/dexopt_chroot_setup.te
@@ -52,6 +52,7 @@
   apex_mnt_dir
   apk_data_file
   binderfs
+  binfmt_miscfs
   cgroup
   cgroup_v2
   userdebug_or_eng(debugfs)
@@ -81,6 +82,7 @@
 
 allow dexopt_chroot_setup {
   binderfs
+  binfmt_miscfs
   cgroup
   cgroup_v2
   userdebug_or_eng(debugfs)