Replace encodeToData with SkPngEncoder

#include <SkTypeface.h>

#include <dlfcn.h>

#include <gui/TraceUtils.h>

#include <include/encode/SkPngEncoder.h>

#include <inttypes.h>

#include <media/NdkImage.h>

#include <media/NdkImageReader.h>

#include <algorithm>

#include <atomic>

#include <log/log.h>

#include <vector>

#include "JvmErrorReporter.h"

        if (iter != context->mTextureMap.end()) {

            img = iter->second.get();

        }

        return img->encodeToData();

        if (!img) {

            return nullptr;

        }

        // The following encode (specifically the pixel readback) will fail on a

        // texture-backed image. They should already be raster images, but on

        // the off-chance they aren't, we will just serialize it as nothing.

        if (img->isTextureBacked()) {

            return SkData::MakeEmpty();

        }

        return SkPngEncoder::Encode(nullptr, img, {});

    }

    void serialize(SkWStream* stream) const override {