Revert "Revert "Fix an outstanding compaction bug in interpreter.""

Fixed the generic trampoline to not use ToJObject when unnecessary.

Bug: 15167269

This reverts commit 3bdb873122964da7937eb070cbcf2ef638a8e459.

Change-Id: I0525d0e0f3afb753c770e1572070a0fa22b02271
diff --git a/runtime/monitor.cc b/runtime/monitor.cc
index c53520d..4a4dffb 100644
--- a/runtime/monitor.cc
+++ b/runtime/monitor.cc
@@ -637,7 +637,7 @@
   }
 }
 
-void Monitor::InflateThinLocked(Thread* self, Handle<mirror::Object>& obj, LockWord lock_word,
+void Monitor::InflateThinLocked(Thread* self, Handle<mirror::Object> obj, LockWord lock_word,
                                 uint32_t hash_code) {
   DCHECK_EQ(lock_word.GetState(), LockWord::kThinLocked);
   uint32_t owner_thread_id = lock_word.ThinLockOwner();