Don't use stubs for host apexs

Host apexs don't have a system-image associated with them so we need
to include all libraries, including those with stubs.

Test: ./art/test/testrunner/run_build_test_target.py -j50 art-linux-bionic-x64-zipapex
Bug: 125417922
Change-Id: Ie76e6a34e8be1057b29e2e005597c3e4b5fb1f9c