Use ClassStatus::kVisiblyInitialized in reflection.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: aosp_taimen-userdebug boots.
Test: run-gtests.sh
Test: testrunner.py --target --optimizing
Bug: 36692143
Change-Id: I53342f5bb6285c9ca95445791dd10e04c6d8f962
3 files changed