Clean up ScopedThreadStateChange to use ObjPtr

Also fixed inclusion of -inl.h files in .h files by adding
scoped_object_access-inl.h and scoped_fast_natvie_object_access-inl.h

Changed AddLocalReference / Decode to use ObjPtr.

Changed libartbenchmark to be debug to avoid linkage errors.

Bug: 31113334

Test: test-art-host

Change-Id: I4d2e160483a29d21e1e0e440585ed328b9811483
diff --git a/runtime/native/java_lang_Thread.cc b/runtime/native/java_lang_Thread.cc
index a742e81..0635261 100644
--- a/runtime/native/java_lang_Thread.cc
+++ b/runtime/native/java_lang_Thread.cc
@@ -20,8 +20,8 @@
 #include "jni_internal.h"
 #include "monitor.h"
 #include "mirror/object.h"
-#include "scoped_fast_native_object_access.h"
-#include "scoped_thread_state_change.h"
+#include "scoped_fast_native_object_access-inl.h"
+#include "scoped_thread_state_change-inl.h"
 #include "ScopedUtfChars.h"
 #include "thread.h"
 #include "thread_list.h"
@@ -109,14 +109,14 @@
 
 static jboolean Thread_nativeHoldsLock(JNIEnv* env, jobject java_thread, jobject java_object) {
   ScopedObjectAccess soa(env);
-  mirror::Object* object = soa.Decode<mirror::Object*>(java_object);
+  ObjPtr<mirror::Object> object = soa.Decode<mirror::Object>(java_object);
   if (object == nullptr) {
     ThrowNullPointerException("object == null");
     return JNI_FALSE;
   }
   MutexLock mu(soa.Self(), *Locks::thread_list_lock_);
   Thread* thread = Thread::FromManagedThread(soa, java_thread);
-  return thread->HoldsLock(object);
+  return thread->HoldsLock(object.Decode());
 }
 
 static void Thread_nativeInterrupt(JNIEnv* env, jobject java_thread) {
@@ -132,7 +132,7 @@
   ScopedUtfChars name(env, java_name);
   {
     ScopedObjectAccess soa(env);
-    if (soa.Decode<mirror::Object*>(peer) == soa.Self()->GetPeer()) {
+    if (soa.Decode<mirror::Object>(peer) == soa.Self()->GetPeer()) {
       soa.Self()->SetThreadName(name.c_str());
       return;
     }
@@ -172,8 +172,8 @@
 
 static void Thread_sleep(JNIEnv* env, jclass, jobject java_lock, jlong ms, jint ns) {
   ScopedFastNativeObjectAccess soa(env);
-  mirror::Object* lock = soa.Decode<mirror::Object*>(java_lock);
-  Monitor::Wait(Thread::Current(), lock, ms, ns, true, kSleeping);
+  ObjPtr<mirror::Object> lock = soa.Decode<mirror::Object>(java_lock);
+  Monitor::Wait(Thread::Current(), lock.Decode(), ms, ns, true, kSleeping);
 }
 
 /*