Fix transitive dependencies on SkImageEncoder

In https://skia-review.googlesource.com/c/skia/+/512416,
we would like to decouple SkImage and SkImageEncoder. This CL
was created by searching for use of these objects:
 - SkEncodedImageFormat
 - SkStream
 - SkData
 - SkBitmap
 - SkPixmap

and making sure those files followed the Include What You Use
(IWYU) guidelines.

Signed-off-by: Kevin Lubick <kjlubick@google.com>
Change-Id: I8edbcd1c9a526b8084d7e2c023895d1ad2f8c9b1
diff --git a/libs/hwui/jni/YuvToJpegEncoder.h b/libs/hwui/jni/YuvToJpegEncoder.h
index 7e7b935..a69726b1 100644
--- a/libs/hwui/jni/YuvToJpegEncoder.h
+++ b/libs/hwui/jni/YuvToJpegEncoder.h
@@ -1,13 +1,13 @@
 #ifndef _ANDROID_GRAPHICS_YUV_TO_JPEG_ENCODER_H_
 #define _ANDROID_GRAPHICS_YUV_TO_JPEG_ENCODER_H_
 
-#include "SkTypes.h"
-#include "SkStream.h"
 extern "C" {
     #include "jpeglib.h"
     #include "jerror.h"
 }
 
+class SkWStream;
+
 class YuvToJpegEncoder {
 public:
     /** Create an encoder based on the YUV format.