Verify j.l.invoke.MethodHandleInfo/Natives against OpenJDK 8u121-b13

The MethodHandleInfo class has a number of patches to inline constants
and methods from the upstream MethodHandleNatives class instead of just
including the MethodHandleNatives class. This change adds the
MethodHandleNatives class and reverts those patches. The
MethodHandleNatives class does require some patches in order to remove
code that does not compile or which is otherwise unused. However,
patches that remove code are generally less risky and easier to
maintain than patches that change the code so this seems like a better
trade off.

The refKind...() methods in MethodHandleInfo could not be removed
because they were accidentally added to the public API in API level 26.
The removal of those methods can be tracked under bug 114175595.

Bug: 74379469
Test: make checkbuild, flash and start up device
Change-Id: I843707564e9cf5c7fbf52bfa7ce4b6a2b10c0836