I think I am running into the issue, that I am not having the google-service.json file present, in my app.
After updating that, I did follow the instructions, on the readme, in the "cordova" folder of the helloworld:
06-10 10:52:52.039 4894 4894 E AndroidRuntime: java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.IllegalStateException: Incorrect provider authority in manifest. Most likely due to a missing applicationId variable in application's build.gradle.
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.installProvider(ActivityThread.java:5156)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.-wrap1(ActivityThread.java)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: Caused by: java.lang.IllegalStateException: Incorrect provider authority in manifest. Most likely due to a missing applicationId variable in application's build.gradle.
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at com.google.firebase.provider.FirebaseInitProvider.zza(Unknown Source)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: at android.app.ActivityThread.installProvider(ActivityThread.java:5153)
06-10 10:52:52.039 4894 4894 E AndroidRuntime: ... 10 more
06-10 10:52:52.040 4996 2592 W ActivityManager: Force finishing activity org.jboss.aerogear.unifiedpush.HelloWorld/.MainActivity
06-10 10:52:52.129 23947 24146 I Icing : Indexing B96E309EB2416B4DBFAE0D6623436A2C7956B584 from com.google.android.gms
06-10 10:52:52.222 4996 6509 I OpenGLRenderer: Initialized EGL, version 1.4
06-10 10:52:52.231 23947 24146 I Icing : Indexing done B96E309EB2416B4DBFAE0D6623436A2C7956B584
06-10 10:52:52.236 23947 24146 I Icing : Indexing 209BD54564CA1E38C7343A8DD5819E6471F3968C from com.google.android.googlequicksearchbox
06-10 10:52:52.269 4996 5005 I art : Background partial concurrent mark sweep GC freed 22954(1750KB) AllocSpace objects, 0(0B) LOS objects, 26% free, 43MB/59MB, paused 1.180ms total 114.805ms
06-10 10:52:52.321 23947 24058 I Icing : Indexing done 209BD54564CA1E38C7343A8DD5819E6471F3968C
06-10 10:52:52.661 4996 5039 W ActivityManager: Activity pause timeout for ActivityRecord{16012ae u0 org.jboss.aerogear.unifiedpush.HelloWorld/.MainActivity t1391 f}