* Add smoke test for the new Android embedding
* Update AndroidManifest.xml in app template
* Update test README.md
* Remove widget_test.dart
* Update pubspec.yaml
* Force GeneratedPluginRegistrant.java
This disables the Firebase Test Lab release smoke test, I think it's failing for reasons that probably don't have to do with the commit that started failing (which I think is dd51afd).
This is blocking autoroll of flutter/engine@b7b791b which fixes a TODAY bug: #36079