Bug fix in campaigns

[ashishkumar468]

Description (required)

Fixes #78 Show news about ongoing campaigns/competitions

What changes did you make and why?

• Sort the campaigns by date, and show the campaign whose
  startDate<=currentDate<=endDate

Tests performed (required)

Tested {build variant, ProdDebug} on {One Plus 3T} with API level {26}.

[codecov-io]

Codecov Report

Merging #2119 into master will increase coverage by 0.02%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #2119      +/-   ##
=========================================
+ Coverage    5.49%   5.52%   +0.02%     
=========================================
  Files         231     234       +3     
  Lines       11546   11598      +52     
  Branches     1075    1080       +5     
=========================================
+ Hits          635     641       +6     
- Misses      10859   10904      +45     
- Partials       52      53       +1

Impacted Files	Coverage Δ
...free/nrw/commons/campaigns/CampaignsPresenter.java	0% <0%> (ø)	⬆️
...ain/java/fr/free/nrw/commons/upload/FileUtils.java	2.13% <0%> (-0.1%)	⬇️
...java/fr/free/nrw/commons/nearby/PlaceRenderer.java	0% <0%> (ø)	⬆️
...fr/free/nrw/commons/nearby/NearbyListFragment.java	0% <0%> (ø)	⬆️
...free/nrw/commons/wikidata/WikidataEditService.java	0% <0%> (ø)	⬆️
...ava/fr/free/nrw/commons/upload/UploadActivity.java	0% <0%> (ø)	⬆️
.../commons/contributions/ContributionController.java	0% <0%> (ø)	⬆️
...nrw/commons/notification/NotificationRenderer.java	0% <0%> (ø)	⬆️
...bookmarks/locations/BookmarkLocationsFragment.java	0% <0%> (ø)	⬆️
...ain/java/fr/free/nrw/commons/utils/ImageUtils.java	0% <0%> (ø)	⬆️
... and 7 more

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[misaochan]

@ashishkumar468 , does this work for you? I changed https://github.com/commons-app/campaigns/blob/master/campaigns.json to end on 30 Dec, but no campaign is displaying for me.

[misaochan]

Works perfectly now, thanks! :)