Do not test class unloading in 626-const-class-linking

Keep tests that classes were not unloaded but do not test
that they are actually unloaded. Both JIT and tracing can
hold onto those classes.

Test: m ART_USE_JIT=true test-art-host-run-test-626-const-class-linking
Test: m ART_TEST_TRACE=true test-art-host-run-test-626-const-class-linking
Bug: 30627598
Change-Id: If9d1da45d8691c5ee05b6cf500d7d132bcab611f
1 file changed