Allow vold_prepare_subdirs to delete more files.

Bug: 78591623
Test: Create a new user with a fingerprint. Reboot. Delete that user.
    Check for denials, files left over in /data/*_{c,d}e/10
Merged-In: Ib818e112a98c5b954ee829e93ebd69c3b12940cf
Change-Id: Ib818e112a98c5b954ee829e93ebd69c3b12940cf