Modify SkPngCodec to recognize 565 images from the sBIT chunk

include/codec/SkCodec.h

Index: include/codec/SkCodec.h
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index c5dc66a4743ff7443b18b97023da5b318bd36456..ced0c630e0816a1088bf1ec7f934a8c7e8548030 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -526,6 +526,15 @@ protected:
             sk_sp<SkColorSpace> = nullptr,
             Origin = kTopLeft_Origin);
 
+    /**
+     *  Takes ownership of SkStream*
+     *  Allows the subclass to set the recommended SkImageInfo
+     */
+    SkCodec(const SkEncodedInfo&,
+            const SkImageInfo&,
+            SkStream*,
+            Origin = kTopLeft_Origin);
+
     virtual SkISize onGetScaledDimensions(float /*desiredScale*/) const {
         // By default, scaling is not supported.
         return this->getInfo().dimensions();