Fix conflict between different product flavors

[maskaravivek]

Fix conflict between different product flavors so that beta and prod apps could coexist

Title (required)

Fixes #1725

Tests performed (required)

Able to install and log in to both beta and prod flavors of the app simultaneously.

Screenshots showing what changed (optional)

[codecov-io]

Codecov Report

Merging #1726 into 2.8-release will not change coverage.
The diff coverage is 25%.

@@             Coverage Diff             @@
##           2.8-release   #1726   +/-   ##
===========================================
  Coverage         3.89%   3.89%           
===========================================
  Files              151     151           
  Lines             7521    7521           
  Branches           705     705           
===========================================
  Hits               293     293           
  Misses            7211    7211           
  Partials            17      17

Impacted Files	Coverage Δ
...ain/java/fr/free/nrw/commons/auth/AccountUtil.java	0% <ø> (ø)	⬆️
...java/fr/free/nrw/commons/upload/UploadService.java	0% <0%> (ø)	⬆️
...free/nrw/commons/upload/MultipleShareActivity.java	0% <0%> (ø)	⬆️
...n/java/fr/free/nrw/commons/auth/LoginActivity.java	0% <0%> (ø)	⬆️
...ree/nrw/commons/auth/WikiAccountAuthenticator.java	0% <0%> (ø)	⬆️
...java/fr/free/nrw/commons/upload/ShareActivity.java	0% <0%> (ø)	⬆️
...w/commons/contributions/ContributionsActivity.java	0% <0%> (ø)	⬆️
.../free/nrw/commons/di/CommonsApplicationModule.java	50% <0%> (ø)	⬆️
...ommons/modifications/ModificationsSyncAdapter.java	0% <0%> (ø)	⬆️
.../nrw/commons/category/CategoryContentProvider.java	10.71% <100%> (ø)	⬆️
... and 3 more

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[misaochan]

Thanks @maskaravivek , this will be quite useful.

Edited: Oh sorry, it works after running clean project. Will proceed with testing now.

[misaochan]

Works well for me! This will make testing much easier. :)