Update comments for security type in AccessPoint

There are no resources in array.xml that references the security or
PSK field, so updating the comments to match.
There is also no need to keep the list sorted -- new values should be
added to the end and any string-array resource values can be added to
the end accordingly.

Test: None
Change-Id: I85e7de9c9f08468f6aaeaa9af1482e304a501a76