Remove include of private SkUtils.h file

Nothing from SkUtils.h appeared to actually be used.
I also added some missing (transitive) #includes

Change-Id: Iad7bac9fdd978c581dd850485d8979b779a46fc8
Bug: skbug.com/13983

libs/hwui/jni/BitmapFactory.cpp

@@ -22,7 +22,6 @@
 #include "SkSize.h"
 #include "SkStream.h"
 #include "SkString.h"
-#include "SkUtils.h"
 #include "Utils.h"
 
 #include <HardwareBitmapUploader.h>

libs/hwui/jni/Movie.cpp

@@ -3,8 +3,8 @@
 #include "GraphicsJNI.h"
 #include <nativehelper/ScopedLocalRef.h>
 #include "Movie.h"
+#include "SkRefCnt.h"
 #include "SkStream.h"
-#include "SkUtils.h"
 #include "Utils.h"
 
 #include <androidfw/Asset.h>

libs/hwui/jni/Utils.cpp

@@ -15,8 +15,9 @@
  */
 
 #include "Utils.h"
-#include "SkUtils.h"
 #include "SkData.h"
+#include "SkRefCnt.h"
+#include "SkStream.h"
 
 #include <inttypes.h>
 #include <log/log.h>