Remove mirror::String::java_lang_String_.

And simplify ClassLinker::InitWithoutImage().
And finish ObjPtr<>-ification of annotation processing.

Test: m test-art-host-gtest
Test: testrunner.py --host
Bug: 31113334
Change-Id: I882a6c2f2b2a88d6ba34e4759bac4a6caa54cafa
17 files changed