Move SaveImage-, DeleteImage- to separate files

/*

 * Copyright (C) 2019 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.systemui.screenshot;

import android.content.ContentResolver;

import android.content.Context;

import android.net.Uri;

import android.os.AsyncTask;

/**

 * An AsyncTask that deletes an image from the media store in the background.

 */

class DeleteImageInBackgroundTask extends AsyncTask<Uri, Void, Void> {

    private Context mContext;

    DeleteImageInBackgroundTask(Context context) {

        mContext = context;

    }

    @Override

    protected Void doInBackground(Uri... params) {

        if (params.length != 1) return null;

        Uri screenshotUri = params[0];

        ContentResolver resolver = mContext.getContentResolver();

        resolver.delete(screenshotUri, null, null);

        return null;

    }

}