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/Android.bp b/test/Android.bp
index 26c4f93..5a8f43e 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -261,6 +261,7 @@
         "912-classes/classes.cc",
         "913-heaps/heaps.cc",
         "918-fields/fields.cc",
+        "920-objects/objects.cc",
     ],
     shared_libs: [
         "libbase",