BugFix invalid upload count string

[ashishkumar468]

• Added non empty check in response.body() in OkHttpJsonApiClient$getUploadCount

Description (required)

Fixes #2987 App crashes when response body is empty [but not null] in getUploadCount()

What changes did you make and why?
Added non-empty check in response.body() in getUploadCount()
Tests performed (required)

Tested {ProdDebug} on Samsung S6 with Api Level 27

Screenshots showing what changed (optional - for UI changes)

NA

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[neslihanturan]

Thanks a lot for very fast Pr @ashishkumar0207 . I see this error:

2019-06-04 15:41:05.182 5218-5218/fr.free.nrw.commons E/AchievementsActivity: Error:java.lang.NullPointerException: Attempt to invoke virtual method 'int fr.free.nrw.commons.wikidata.model.GetWikidataEditCountResponse.getWikidataEditCount()' on a null object reference

And my achievement says I have no contributions on prod debug.

[ashishkumar468]

This is

Thanks a lot for very fast Pr @ashishkumar0207 . I see this error:

2019-06-04 15:41:05.182 5218-5218/fr.free.nrw.commons E/AchievementsActivity: Error:java.lang.NullPointerException: Attempt to invoke virtual method 'int fr.free.nrw.commons.wikidata.model.GetWikidataEditCountResponse.getWikidataEditCount()' on a null object reference

And my achievement says I have no contributions on prod debug.

@neslihanturan This seems to be unrelated to this PR, this PR fixes the issue with UploadCount, while this error is related with WikidataEditResponse, shall we create a separate issue for it ?