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_String.cc b/runtime/native/java_lang_String.cc
index aa64b79..b3a967d 100644
--- a/runtime/native/java_lang_String.cc
+++ b/runtime/native/java_lang_String.cc
@@ -22,8 +22,8 @@
 #include "mirror/object-inl.h"
 #include "mirror/string.h"
 #include "mirror/string-inl.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 "ScopedLocalRef.h"
 #include "verify_object-inl.h"
 
@@ -31,7 +31,7 @@
 
 static jchar String_charAt(JNIEnv* env, jobject java_this, jint index) {
   ScopedFastNativeObjectAccess soa(env);
-  return soa.Decode<mirror::String*>(java_this)->CharAt(index);
+  return soa.Decode<mirror::String>(java_this)->CharAt(index);
 }
 
 static jint String_compareTo(JNIEnv* env, jobject java_this, jobject java_rhs) {
@@ -40,7 +40,8 @@
     ThrowNullPointerException("rhs == null");
     return -1;
   } else {
-    return soa.Decode<mirror::String*>(java_this)->CompareTo(soa.Decode<mirror::String*>(java_rhs));
+    return soa.Decode<mirror::String>(java_this)->CompareTo(
+        soa.Decode<mirror::String>(java_rhs).Decode());
   }
 }
 
@@ -51,8 +52,8 @@
     return nullptr;
   }
   StackHandleScope<2> hs(soa.Self());
-  Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String*>(java_this)));
-  Handle<mirror::String> string_arg(hs.NewHandle(soa.Decode<mirror::String*>(java_string_arg)));
+  Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String>(java_this)));
+  Handle<mirror::String> string_arg(hs.NewHandle(soa.Decode<mirror::String>(java_string_arg)));
   int32_t length_this = string_this->GetLength();
   int32_t length_arg = string_arg->GetLength();
   if (length_arg > 0 && length_this > 0) {
@@ -67,13 +68,13 @@
   ScopedFastNativeObjectAccess soa(env);
   // This method does not handle supplementary characters. They're dealt with in managed code.
   DCHECK_LE(ch, 0xffff);
-  return soa.Decode<mirror::String*>(java_this)->FastIndexOf(ch, start);
+  return soa.Decode<mirror::String>(java_this)->FastIndexOf(ch, start);
 }
 
 static jstring String_fastSubstring(JNIEnv* env, jobject java_this, jint start, jint length) {
   ScopedFastNativeObjectAccess soa(env);
   StackHandleScope<1> hs(soa.Self());
-  Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String*>(java_this)));
+  Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String>(java_this)));
   gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
   mirror::String* result = mirror::String::AllocFromString<true>(soa.Self(), length, string_this,
                                                                  start, allocator_type);
@@ -84,25 +85,24 @@
                                    jcharArray buffer, jint index) {
   ScopedFastNativeObjectAccess soa(env);
   StackHandleScope<1> hs(soa.Self());
-  Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray*>(buffer)));
-  soa.Decode<mirror::String*>(java_this)->GetChars(start, end, char_array, index);
+  Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray>(buffer)));
+  soa.Decode<mirror::String>(java_this)->GetChars(start, end, char_array, index);
 }
 
 static jstring String_intern(JNIEnv* env, jobject java_this) {
   ScopedFastNativeObjectAccess soa(env);
-  mirror::String* s = soa.Decode<mirror::String*>(java_this);
-  mirror::String* result = s->Intern();
+  ObjPtr<mirror::String> result = soa.Decode<mirror::String>(java_this)->Intern();
   return soa.AddLocalReference<jstring>(result);
 }
 
 static void String_setCharAt(JNIEnv* env, jobject java_this, jint index, jchar c) {
   ScopedFastNativeObjectAccess soa(env);
-  soa.Decode<mirror::String*>(java_this)->SetCharAt(index, c);
+  soa.Decode<mirror::String>(java_this)->SetCharAt(index, c);
 }
 
 static jcharArray String_toCharArray(JNIEnv* env, jobject java_this) {
   ScopedFastNativeObjectAccess soa(env);
-  mirror::String* s = soa.Decode<mirror::String*>(java_this);
+  ObjPtr<mirror::String> s = soa.Decode<mirror::String>(java_this);
   return soa.AddLocalReference<jcharArray>(s->ToCharArray(soa.Self()));
 }