Firebase problem with xWalk

[xale76]

Since 17 june, Google released new versione of Firebase. Even if nothing changes in config.xml, plugins version and so on, building in Phonegap fails after 17 june if the project includes push notifications (pushwoosh in example). That's because of google Firebase. I tried to build and the error is:

• What went wrong:
  Execution failed for task ':transformClassesWithJarMergingForRelease'.

com.android.build.api.transform.TransformException: java.util.zip.ZipException: duplicate entry: android/support/v4/app/INotificationSideChannel$Stub$Proxy.class

so I'm wondering how to fix it, In my opinion, using build-extras.gradle and exclude some library could solve, but I don't know which is the library that causes this problem.
Can you help me?
Thanks

[gonzalovinas]

Did you try the https://github.com/ardabeyazoglu/cordova-plugin-crosswalk-webview-v3 fork ?