XamarinDevDays/Demos/app-imagesearch-cogs/ImageSearch/ImageSearch.Droid/Resources/values-v21/styles.xml

<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <!--
        Base application theme for API 21+. This theme completely replaces
        MyTheme from BOTH res/values/styles.xml on API 21+ devices.
    -->
  <style name="MyTheme" parent="MyTheme.Base">
   <item name="android:windowContentTransitions">true</item>
    <item name="android:windowAllowEnterTransitionOverlap">true</item>
    <item name="android:windowAllowReturnTransitionOverlap">true</item>
    <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
    <item name="android:windowSharedElementExitTransition">@android:transition/move</item>
  </style>
</resources>