ART: Refactor retrieval of types through ArtMethod.

Split Get*() functions that take a "bool resolve"
argument into Lookup*() and Resolve*() functions.

Test: m test-art-host-gtest
Test: testrunner.py --host
Change-Id: I0b7eaa1fadc2ffa8c0168203790467f91a126963
diff --git a/runtime/interpreter/interpreter_switch_impl.cc b/runtime/interpreter/interpreter_switch_impl.cc
index 0a2705d..bdb8332 100644
--- a/runtime/interpreter/interpreter_switch_impl.cc
+++ b/runtime/interpreter/interpreter_switch_impl.cc
@@ -349,7 +349,7 @@
         const size_t ref_idx = inst->VRegA_11x(inst_data);
         ObjPtr<mirror::Object> obj_result = shadow_frame.GetVRegReference(ref_idx);
         if (do_assignability_check && obj_result != nullptr) {
-          ObjPtr<mirror::Class> return_type = method->GetReturnType(true /* resolve */);
+          ObjPtr<mirror::Class> return_type = method->ResolveReturnType();
           // Re-load since it might have moved.
           obj_result = shadow_frame.GetVRegReference(ref_idx);
           if (return_type == nullptr) {