App crashes when response body is empty [but not null] in getUploadCount()

[ashishkumar468]

System logs:

Fetching upload count failed
java.lang.NumberFormatException: For input string: ""
at java.lang.Integer.parseInt(Integer.java:620)
at java.lang.Integer.parseInt(Integer.java:643)
at fr.free.nrw.commons.mwapi.OkHttpJsonApiClient.lambda$getUploadCount$0(OkHttpJsonApiClient.java:102)
at fr.free.nrw.commons.mwapi.-$$Lambda$OkHttpJsonApiClient$9ZpGX0U5Zngts_jcRCFls7FtEIM.call(Unknown Source:4)
at io.reactivex.internal.operators.single.SingleFromCallable.subscribeActual(SingleFromCallable.java:44)
at io.reactivex.Single.subscribe(Single.java:3438)
at io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
at io.reactivex.Scheduler$DisposeTask.run(Scheduler.java:578)
at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)

**Device and Android version:** 

NA
 
**Commons app version:** 
2.10.2

**Would you like to work on the issue?**
YES