[Dialog][DatePicker][TimePicker] Updated enter/exit animation to use …

…fade pattern and motion tokens.

Added xml implementations of the Material Fade pattern (https://github.com/material-components/material-components-android/blob/master/docs/theming/Motion.md#fade) and updated all dialogs to use the new animators for enter and exit animations.

PiperOrigin-RevId: 489271559

lib/java/com/google/android/material/dialog/res/values/styles.xml

@@ -167,4 +167,9 @@
     <item name="android:gravity">center</item>
     <item name="android:textAlignment" tools:ignore="NewApi">gravity</item>
   </style>
+
+  <style name="MaterialAlertDialog.Material3.Animation">
+    <item name="android:windowEnterAnimation">@anim/m3_motion_fade_enter</item>
+    <item name="android:windowExitAnimation">@anim/m3_motion_fade_exit</item>
+  </style>
 </resources>

lib/java/com/google/android/material/dialog/res/values/themes_overlay.xml

@@ -73,6 +73,7 @@
 
   <style name="Base.ThemeOverlay.Material3.Dialog" parent="Base.ThemeOverlay.MaterialComponents.Dialog">
     <item name="materialButtonStyle">@style/Widget.Material3.Button.TextButton.Dialog.Flush</item>
+    <item name="android:windowAnimationStyle">@style/MaterialAlertDialog.Material3.Animation</item>
   </style>
 
   <style name="ThemeOverlay.Material3.Dialog" parent="Base.ThemeOverlay.Material3.Dialog"/>
@@ -102,6 +103,7 @@
     <item name="materialAlertDialogTitleIconStyle">@style/MaterialAlertDialog.Material3.Title.Icon</item>
     <item name="materialAlertDialogTitleTextStyle">@style/MaterialAlertDialog.Material3.Title.Text</item>
     <item name="materialAlertDialogBodyTextStyle">@style/MaterialAlertDialog.Material3.Body.Text</item>
+    <item name="android:windowAnimationStyle">@style/MaterialAlertDialog.Material3.Animation</item>
   </style>
 
   <!-- A theme overlay for Material3 Alert Dialog panels with a center aligned title text and icon. -->

lib/java/com/google/android/material/motion/res/anim/m3_motion_fade_enter.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Copyright (C) 2022 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.
+-->
+
+<!-- An XML implementation of the Material fade pattern -->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="@integer/m3_sys_motion_duration_medium4"
+    android:interpolator="@interpolator/m3_sys_motion_easing_emphasized_decelerate"
+    android:shareInterpolator="true">
+  <alpha
+      android:fromAlpha="0.0"
+      android:toAlpha="1.0" />
+  <scale
+      android:fromXScale="0.8"
+      android:fromYScale="0.8"
+      android:pivotX="50%"
+      android:pivotY="50%"
+      android:toXScale="1"
+      android:toYScale="1" />
+</set>

lib/java/com/google/android/material/motion/res/anim/m3_motion_fade_exit.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Copyright (C) 2022 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.
+-->
+
+<!-- An XML implementation of the Material fade pattern -->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="@integer/m3_sys_motion_duration_short3"
+    android:interpolator="@interpolator/m3_sys_motion_easing_emphasized_accelerate"
+    android:shareInterpolator="true">
+  <alpha
+      android:fromAlpha="1.0"
+      android:toAlpha="0.0" />
+</set>