ART: Clean up art_field.h

Clean up the header. Fix up other headers including the -inl file,
in an effort to prune the include graph. Fix broken transitive
includes by making includes explicit.

Test: m
Change-Id: I6ff2d6f89b741d8188e19426eccf4743fec688fc
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index d78ed7f..2247f7d 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -19,13 +19,14 @@
 
 #include "class.h"
 
-#include "art_field-inl.h"
+#include "art_field.h"
 #include "art_method.h"
 #include "base/array_slice.h"
 #include "base/length_prefixed_array.h"
+#include "class_linker-inl.h"
 #include "class_loader.h"
 #include "common_throws.h"
-#include "dex_file.h"
+#include "dex_file-inl.h"
 #include "gc/heap-inl.h"
 #include "iftable.h"
 #include "object_array-inl.h"