ART: Add GetObjectSize and GetObjectHashCode

Add support for these two functions. Add tests.

Bug: 31684578
Test: m test-art-host-run-test-920-objects
Change-Id: If5dfb5aedddee47e5d739b0c56c7d264ba6e2d51
diff --git a/test/920-objects/objects.h b/test/920-objects/objects.h
new file mode 100644
index 0000000..5f21e7b
--- /dev/null
+++ b/test/920-objects/objects.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_TEST_920_OBJECTS_OBJECTS_H_
+#define ART_TEST_920_OBJECTS_OBJECTS_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test920Objects {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+}  // namespace Test920Objects
+}  // namespace art
+
+#endif  // ART_TEST_920_OBJECTS_OBJECTS_H_