Rename classes in art hiddenapi tests

Use more inclusive terminology (go/hiddenapi-list-renaming).

Bug: 162500436
Test: art/test/testrunner/testrunner.py --target --64 -t 674-hiddenapi
Test: art/test/testrunner/testrunner.py --target --64 -t 999-redefine-hiddenapi
Change-Id: I9a5139b04196187cbb063c9d122047a8fbc455ce
13 files changed