Replaced campaignPreference with CAMPAIGNS_DEFAULT_PREFERENCE

[Kwong-Yu-Zhou]

Fixed the bug "Swiping campaign notification shows 'You won't see campaigns anymore', but actually same notification comes back after a few days."

Fixes #5288

What changes did you make and why?

I replaced the variable campaignPreference with CAMPAIGNS_DEFAULT_PREFERENCE.

In the ContributionsFragment class, the function fetchCampaigns() checks the CAMPAIGNS_DEFAULT_PREFERENCE if it is True. However, in the CampaignView class, it switches campaignPreference to False without updating the default preference after swiping.

apps-android-commons/app/src/main/java/fr/free/nrw/commons/contributions/ContributionsFragment.java

Line 591 in 1490710

} else if (store.getBoolean(CampaignView.CAMPAIGNS_DEFAULT_PREFERENCE, true)) {

apps-android-commons/app/src/main/java/fr/free/nrw/commons/campaigns/CampaignView.java

Line 72 in 1490710

.putBoolean(campaignPreference, false);

Tested {} on {emulator 32.1.12-9751036} with API level {API Tiramisu}.

Screenshots (for UI changes only)

Need help? See https://support.google.com/android/answer/9075928

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Note: Please ensure that you have read CONTRIBUTING.md if this is your first pull request.

[nicolas-raoul]

I added a currently-running campaign so that it can be tested.
Strangely now I can nor reproduce the issue on the main branch... are you able to reproduce it? if yes, any tip to make it happen reliably? Thanks! :-)