sort special Android accounts by UID
convert Android account descriptions to string resources
include account username in special package description

(for consistency with the other specials)
avoid repeating the list of special Android accounts

The list of special Android accounts is about to get much bigger; move
the account names to a separate array and iterate over it to avoid
keeping two separate lists in sync.
add all special Android accounts

Some processes run as these accounts and need Internet access (e.g.,
the DRM server, which runs as the drm user and contacts servers to
check for rights).  Add all of them so that users can grant/revoke
access as desired.  Unfortunately these accounts are not well
documented, so users will have to figure things out for themselves.

The account descriptions were copied from android_filesystem_config.h
(Android source code).

Some of these accounts are only used as supplemental group IDs to
grant additional privileges to apps.  Any account that is only used as
a supplemental group ID can be commented out, but it's not clear which
ones are only used this way so they're all included.