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/native/java_lang_reflect_Executable.cc b/runtime/native/java_lang_reflect_Executable.cc
index 2aad12d..f209f1d 100644
--- a/runtime/native/java_lang_reflect_Executable.cc
+++ b/runtime/native/java_lang_reflect_Executable.cc
@@ -260,7 +260,7 @@
   ScopedFastNativeObjectAccess soa(env);
   ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
   method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
-  ObjPtr<mirror::Class> return_type(method->GetReturnType(true /* resolve */));
+  ObjPtr<mirror::Class> return_type(method->ResolveReturnType());
   if (return_type.IsNull()) {
     CHECK(soa.Self()->IsExceptionPending());
     return nullptr;