Revert "Temporarily blacklist MethodHandles tests."

This reverts commit 7b019aa7d7b9ef6ec4733347d8966378c45b81bf.

Test: make checkbuild
Test: art/tools/run-libcore-tests.sh --mode=host --variant=X64
bug: 31675876
Change-Id: Ib61b90cd041214bbafa818de251301d44f262b10
1 file changed