core/res/res/anim/lock_screen_behind_enter.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2007, 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.
*/
-->

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:detachWallpaper="true" android:shareInterpolator="false">
    <scale
        android:fromXScale="0.95" android:toXScale="1.0"
        android:fromYScale="0.95" android:toYScale="1.0"
        android:pivotX="50%p" android:pivotY="50%p"
        android:fillEnabled="true" android:fillBefore="true"
        android:interpolator="@interpolator/decelerate_cubic"
        android:startOffset="@android:integer/config_shortAnimTime"
        android:duration="@android:integer/config_shortAnimTime" />
    <alpha
        android:fromAlpha="0.0" android:toAlpha="1.0"
        android:fillEnabled="true" android:fillBefore="true"
        android:interpolator="@interpolator/decelerate_quad"
        android:startOffset="@android:integer/config_shortAnimTime"
        android:duration="@android:integer/config_shortAnimTime"/>
</set>