Log error to firebase - currently it's ignored.

[hossain-khan]

I believe I have used onErrorResumeNext in code, which completely ignores the error.
Instead make sure it's logged to firebase and then it's ignored gracefully.

E/AndroidRuntime: FATAL EXCEPTION: main
 Process: package, PID: 1950
 java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling.
     at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:112)
     at android.os.Handler.handleCallback(Handler.java:742)
     at android.os.Handler.dispatchMessage(Handler.java:97)
     at android.os.Looper.loop(Looper.java:148)
     at android.app.ActivityThread.main(ActivityThread.java:5482)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
  Caused by: rx.exceptions.OnErrorNotImplementedException: HTTP 400 Bad Request
     at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:386)
     at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:383)
     at rx.internal.util.ActionSubscriber.onError(ActionSubscriber.java:44)
     at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:153)
     at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
     at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.checkTerminated(OperatorObserveOn.java:273)
     at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call(OperatorObserveOn.java:216)
     at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
     at android.os.Handler.handleCallback(Handler.java:742) 
     at android.os.Handler.dispatchMessage(Handler.java:97) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.app.ActivityThread.main(ActivityThread.java:5482) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
  Caused by: retrofit2.adapter.rxjava.HttpException: HTTP 400 Bad Request
     at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:43)
     at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:38)
     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
     at rx.internal.operators.OperatorSubscribeOn$1$1$1.request(OperatorSubscribeOn.java:80)
     at rx.Subscriber.setProducer(Subscriber.java:211)
     at rx.internal.operators.OperatorSubscribeOn$1$1.setProducer(OperatorSubscribeOn.java:76)
     at rx.Subscriber.setProducer(Subscriber.java:205)
     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
     at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
     at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
     at rx.Observable.unsafeSubscribe(Observable.java:10140)
     at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
     at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:228)
     at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
     at java.lang.Thread.run(Thread.java:818)