Pass a full  MethodReference of the invoke in HInvoke nodes.

Cleanup to ensure we don't make mistakes when passing a dex method index
to the HInvoke constructor, and we know which dex file it relates to.

Test: test.py
Change-Id: I625949add88a6b97e1dafeb7aed37961e105d6aa
diff --git a/compiler/optimizing/critical_native_abi_fixup_arm.cc b/compiler/optimizing/critical_native_abi_fixup_arm.cc
index 8441423..94a9730 100644
--- a/compiler/optimizing/critical_native_abi_fixup_arm.cc
+++ b/compiler/optimizing/critical_native_abi_fixup_arm.cc
@@ -69,7 +69,7 @@
           /*number_of_arguments=*/ 1u,
           converted_type,
           invoke->GetDexPc(),
-          /*method_index=*/ dex::kDexNoIndex,
+          /*method_reference=*/ MethodReference(nullptr, dex::kDexNoIndex),
           resolved_method,
           dispatch_info,
           kStatic,