ART: Add getDeclaredConstructor cutout for unstarted runtime

In the vein of getDeclaredMethod and getDeclaredField. Refactor
code from java_lang_Class to share code.

Allows to compile-time initialize:
* sun.security.x509.AVAKeyword
* sun.security.x509.X500Name

Bug: 27265238

(cherry picked from commit f72f19fac0016499d33fd75b0463d0128a58a9f4)

Change-Id: I075c1b11f3408f5b31e4f84140a24fd8d3eaa17e
diff --git a/runtime/interpreter/unstarted_runtime.cc b/runtime/interpreter/unstarted_runtime.cc
index 2f22ac4..239b825 100644
--- a/runtime/interpreter/unstarted_runtime.cc
+++ b/runtime/interpreter/unstarted_runtime.cc
@@ -282,6 +282,23 @@
   }
 }
 
+// Special managed code cut-out to allow constructor lookup in a un-started runtime.
+void UnstartedRuntime::UnstartedClassGetDeclaredConstructor(
+    Thread* self, ShadowFrame* shadow_frame, JValue* result, size_t arg_offset) {
+  mirror::Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass();
+  if (klass == nullptr) {
+    ThrowNullPointerExceptionForMethodAccess(shadow_frame->GetMethod(), InvokeType::kVirtual);
+    return;
+  }
+  mirror::ObjectArray<mirror::Class>* args =
+      shadow_frame->GetVRegReference(arg_offset + 1)->AsObjectArray<mirror::Class>();
+  if (Runtime::Current()->IsActiveTransaction()) {
+    result->SetL(mirror::Class::GetDeclaredConstructorInternal<true>(self, klass, args));
+  } else {
+    result->SetL(mirror::Class::GetDeclaredConstructorInternal<false>(self, klass, args));
+  }
+}
+
 void UnstartedRuntime::UnstartedClassGetEnclosingClass(
     Thread* self, ShadowFrame* shadow_frame, JValue* result, size_t arg_offset) {
   StackHandleScope<1> hs(self);
diff --git a/runtime/interpreter/unstarted_runtime_list.h b/runtime/interpreter/unstarted_runtime_list.h
index cb614a1..7aeec61 100644
--- a/runtime/interpreter/unstarted_runtime_list.h
+++ b/runtime/interpreter/unstarted_runtime_list.h
@@ -25,6 +25,7 @@
   V(ClassNewInstance, "java.lang.Object java.lang.Class.newInstance()") \
   V(ClassGetDeclaredField, "java.lang.reflect.Field java.lang.Class.getDeclaredField(java.lang.String)") \
   V(ClassGetDeclaredMethod, "java.lang.reflect.Method java.lang.Class.getDeclaredMethodInternal(java.lang.String, java.lang.Class[])") \
+  V(ClassGetDeclaredConstructor, "java.lang.reflect.Constructor java.lang.Class.getDeclaredConstructorInternal(java.lang.Class[])") \
   V(ClassGetEnclosingClass, "java.lang.Class java.lang.Class.getEnclosingClass()") \
   V(VmClassLoaderFindLoadedClass, "java.lang.Class java.lang.VMClassLoader.findLoadedClass(java.lang.ClassLoader, java.lang.String)") \
   V(VoidLookupType, "java.lang.Class java.lang.Void.lookupType()") \