commit dc81c11b50f087add790a84d09d78947c9be3077
author Jiyong Park <jiyong@google.com> Mon Jan 09 17:41:57 2023 +0900
committer Jiyong Park <jiyong@google.com> Mon Jan 09 23:22:11 2023 +0900
tree c1fc88657cc07e8b8297997c1b4e362f8b2849fb
parent 7581dc3746c674753ed19ffe875ba37180b56336

Root dir of zipfuse gets permission 500

In preparation for enabling `-o default_permissions` the root directory
of a zipfuse filesystem gets the permission mode of 500 so that it is
readable and searchable by the owner.

Bug: 264668376
Test: `ls -al /mnt` inside the VM gives the following:
```
total 4
drwxr-xr-x  9 root system  180 2023-01-09 08:43 .
drwxr-xr-x 14 root root   4096 2021-01-25 10:14 ..
drwxr-xr-x  2 root root     40 2023-01-09 08:43 androidwritable
dr-x------  6 root root      0 1970-01-01 00:00 apk
...
```

Previously, the mode for `apk` was `d---------`.

Change-Id: I2a2513adfd708a93b66dcb70630aeda5036689cc