Add tests with a permanently enabled flag in art-flags.aconfig.

Test: art/test/testrunner/testrunner.py --host 2279-aconfig-flags
Test: art/test/testrunner/testrunner.py --target 2279-aconfig-flags
Test: art/tools/run-gtests.sh \
        /apex/com.android.art/bin/art/x86/art_libartbase_tests \
        | grep Aconfig
Test: m test-art-host-gtest-art_libartbase_tests | grep Aconfig
Bug: 352723620
Change-Id: I693cbef25a8b62f437e6eef95003944f35354177