Add test for PKCS5 PBE schemes with no salt.

This appears to be valid according to the spec, and was allowed before
we changed it, so make it work again.

Bug: 38161557
Test: cts -m CtsLibcoreTestCases
Change-Id: Iacc7f08cd0d2bd2355a6c5cb2515fd9895435915
1 file changed