Simplify name verification in ClassLoaderContext.

Do not go through OatFile::ResolveRelativeEncodedDexLocation
to avoid unnecessary handling of multi-dex suffix. That was
broken anyway because `abs_dex_location` is not expected to
be a multi-dex location as demonstrated by an additional
test which would have previously failed.

Test: Improved test in class_loader_context_test.
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Change-Id: I0a292ed1442393a3de4e8a360593b607b1b37cfd
2 files changed