[ermine] Use the CFv2 variant of screensaver

In a future CL, the CFv1 variant of screensaver will be removed.

Change-Id: I88e3e787485c33a40f0886166199cb458bbfcc60
Reviewed-on: https://fuchsia-review.googlesource.com/c/experiences/+/705603
Reviewed-by: David Worsham <dworsham@google.com>
Commit-Queue: Xyan Bhatnagar <xbhatnag@google.com>
diff --git a/session_shells/ermine/shell/lib/src/states/app_state_impl.dart b/session_shells/ermine/shell/lib/src/states/app_state_impl.dart
index 715cfa9..44e4078 100644
--- a/session_shells/ermine/shell/lib/src/states/app_state_impl.dart
+++ b/session_shells/ermine/shell/lib/src/states/app_state_impl.dart
@@ -46,7 +46,7 @@
   static const kLicenseUrl =
       'fuchsia-pkg://fuchsia.com/license_settings#meta/license_settings.cmx';
   static const kScreenSaverUrl =
-      'fuchsia-pkg://fuchsia.com/screensaver#meta/screensaver.cmx';
+      'fuchsia-pkg://fuchsia.com/screensaver#meta/screensaver.cm';
   static const kEnableUserFeedbackMarkerFile =
       '/pkg/config/enable_user_feedback';