Add ability for the PagedListView to remember and restore its scroll
position.

Test: Test on demo app and add espresso tests.
Bug: 68773978
Change-Id: Ie50aafd1b2e9f2fc2199dee5436c9f38e666c239
diff --git a/car/tests/AndroidManifest.xml b/car/tests/AndroidManifest.xml
index f58390f..949e85a 100644
--- a/car/tests/AndroidManifest.xml
+++ b/car/tests/AndroidManifest.xml
@@ -20,6 +20,7 @@
 
     <application android:supportsRtl="true">
         <activity android:name="android.support.car.widget.ColumnCardViewTestActivity"/>
+        <activity android:name="android.support.car.widget.PagedListViewSavedStateActivity"/>
         <activity android:name="android.support.car.widget.PagedListViewTestActivity"/>
     </application>
 </manifest>