Eliminate invalid test spec in PSS test.

The previous WEIRD_SPEC test spec in AlgorithmParametersPSSTest used a
trailer field value of 3.  RFC 8017 says that the trailer field value
"SHALL be 1", so this is not a valid set of PSS parameters.
Conscrypt's upcoming PSS AlgorithmParameters implementation does not
allow any value other than 1, so this test will fail when we next sync
from upstream.

This change also relabels the test specs so WEIRD_SPEC2 is now named
WEIRD_SPEC.

Test: cts -m CtsLibcoreTestCases -t libcore.java.security.spec.AlgorithmParametersPSSTest
Change-Id: Ia612732e0cc73fa95826565992fb85bb4b6723f2