Fix Skia includes of SkEncodedImageFormat et al (flutter#37201)

Author: kjlubick

lib/ui/painting/image_decoder_unittests.cc

@@ -18,6 +18,11 @@
 #include "flutter/testing/test_dart_native_resolver.h"
 #include "flutter/testing/test_gl_surface.h"
 #include "flutter/testing/testing.h"
+#include "third_party/skia/include/codec/SkCodecAnimation.h"
+#include "third_party/skia/include/core/SkData.h"
+#include "third_party/skia/include/core/SkEncodedImageFormat.h"
+#include "third_party/skia/include/core/SkImageInfo.h"
+#include "third_party/skia/include/core/SkSize.h"
 
 namespace flutter {
 namespace testing {

third_party/txt/tests/render_test.cc

@@ -19,6 +19,9 @@
 #include <string>
 
 #include "flutter/fml/logging.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkEncodedImageFormat.h"
 #include "third_party/skia/include/core/SkImageEncoder.h"
 #include "third_party/skia/include/core/SkStream.h"
 #include "txt/asset_font_manager.h"