Revert "Blacklist test while failing."

This reverts commit 4f743c010604eda9fa8f4b5db19b5b295bc0885e.

The broken test has now been fixed. It has also been moved into a
separate class so this expection will not prevent any tests from
being run anyway.

Bug: 132100102
Test: atest \
    CtsLibcoreTestCases:libcore.java.lang.reflect.annotations.RetentionPolicyTest \
    CtsLibcoreTestCases:libcore.java.lang.reflect.annotations.AnnotationsTest

Change-Id: If68edcbee9b427cf2fd4810aa664bb83816154d3
1 file changed