Revert "Temporarily disable failing libcore tests (caused by mockito merge)."

This reverts commit 4c9b493083cebae58c067642b7a85d93df7a95b0.

Reason for revert: The mockito issue has been fixed.

Test: Ran libcore.java.lang test locally
Change-Id: Iad88ef2a09348a759c3e942a5d06e4e2a4556ced
1 file changed