Remove unused preview container

    <include

        layout="@layout/keyguard_bottom_area"

        android:visibility="gone" />

    <FrameLayout

        android:id="@+id/preview_container"

        android:layout_width="match_parent"

        android:layout_height="match_parent">

    </FrameLayout>

</com.android.systemui.shade.NotificationPanelView>

/*

 * Copyright (C) 2014 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.statusbar.phone;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.ColorFilter;

import android.graphics.drawable.Drawable;

import android.util.AttributeSet;

import android.view.WindowInsets;

import android.widget.FrameLayout;

/**

 * A view group which contains the preview of phone/camera and draws a black bar at the bottom as

 * the fake navigation bar.

 */

public class KeyguardPreviewContainer extends FrameLayout {

    private Drawable mBlackBarDrawable = new Drawable() {

        @Override

        public void draw(Canvas canvas) {

            canvas.save();

            canvas.clipRect(0, getHeight() - getPaddingBottom(), getWidth(), getHeight());

            canvas.drawColor(Color.BLACK);

            canvas.restore();

        }

        @Override

        public void setAlpha(int alpha) {

            // noop

        }

        @Override

        public void setColorFilter(ColorFilter colorFilter) {

            // noop

        }

        @Override

        public int getOpacity() {

            return android.graphics.PixelFormat.OPAQUE;

        }

    };

    public KeyguardPreviewContainer(Context context, AttributeSet attrs) {

        super(context, attrs);

        setBackground(mBlackBarDrawable);

    }

    @Override

    public WindowInsets onApplyWindowInsets(WindowInsets insets) {

        setPadding(0, 0, 0, insets.getStableInsetBottom());

        return super.onApplyWindowInsets(insets);

    }

}