Lint cleanup

final class WallsDiffCallback extends DiffUtil.Callback {

    @NonNull

    private List<WallpaperBundle> mOld;

    private final List<WallpaperBundle> mOld;

    @NonNull

    private List<WallpaperBundle> mNew;

    private final List<WallpaperBundle> mNew;

    WallsDiffCallback(@NonNull final List<WallpaperBundle> oldList,

                      @NonNull final List<WallpaperBundle> newList) {

        mType = type;

    }

    public WallpaperBundle(@NonNull final Parcel parcel) {

    private WallpaperBundle(@NonNull final Parcel parcel) {

        final String parcelName = parcel.readString();

        mName = parcelName == null ? "" : parcelName;

        mContentDrawable = null;

import org.lineageos.backgrounds.bundle.WallpaperBundle;

import org.lineageos.backgrounds.bundle.WallpaperType;

public class BuiltInWallpaperFactory {

public final class BuiltInWallpaperFactory {

    private BuiltInWallpaperFactory() {

    }

import android.content.res.Resources;

import android.content.res.TypedArray;

import android.graphics.Color;

import android.graphics.drawable.Drawable;

import android.util.TypedValue;

import androidx.annotation.NonNull;

import java.util.List;

public class FetchDataTask extends AsyncTask<Void, Integer, List<WallpaperBundle>> implements

public final class FetchDataTask extends AsyncTask<Void, Integer, List<WallpaperBundle>> implements

        FetchDataImpl.Callback {

    private final FetchDataTask.Callback mCallbacks;