Enable the can_maintain_original_method_order capability

Since dex files have a well defined order for methods (alphabetically)
and we fill up the internal art methods_ array in the same order as
they appear in the dex file this capability is trivially implemented.

Test: ./test.py --host -j50
Bug: 62821960
Change-Id: If11c8e49988c896ac6c94dd17a1fcf043367860f