Adding blur supported check to shared lib

/*

 * Copyright (C) 2020 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.shared.system;

import android.app.ActivityManager;

import android.os.SystemProperties;

public abstract class BlurUtils {

    private static boolean mBlurSupportedSysProp = SystemProperties

            .getBoolean("ro.surface_flinger.supports_background_blur", false);

    private static boolean mBlurDisabledSysProp = SystemProperties

            .getBoolean("persist.sys.sf.disable_blurs", false);

    /**

     * If this device can render blurs.

     *

     * @return {@code true} when supported.

     */

    public static boolean supportsBlursOnWindows() {

        return mBlurSupportedSysProp && !mBlurDisabledSysProp && ActivityManager.isHighEndGfx();

    }

}