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/runtime/openjdkjvmti/Android.bp b/runtime/openjdkjvmti/Android.bp
index 6105fec..d486380 100644
--- a/runtime/openjdkjvmti/Android.bp
+++ b/runtime/openjdkjvmti/Android.bp
@@ -24,6 +24,7 @@
            "ti_field.cc",
            "ti_heap.cc",
            "ti_method.cc",
+           "ti_object.cc",
            "ti_stack.cc",
            "ti_redefine.cc",
            "transform.cc"],