Fixes #2922 Beta account alert is missing

[neslihanturan]

Description (required)

Fixes #2922 We used to see a beta login alert text when we login to beta account previously. Somehow it has gone, this PR puts it back.

Tests performed (required)

Tested with betaDebug and prodDebug on API 26 emulator

Screenshots showing what changed (optional - for UI changes)

[codecov-io]

Codecov Report

Merging #2928 into master will not change coverage.
The diff coverage is 0%.

@@          Coverage Diff           @@
##           master   #2928   +/-   ##
======================================
  Coverage    3.64%   3.64%           
======================================
  Files         245     245           
  Lines       12194   12194           
  Branches     1078    1078           
======================================
  Hits          444     444           
  Misses      11716   11716           
  Partials       34      34

Impacted Files	Coverage Δ
...n/java/fr/free/nrw/commons/auth/LoginActivity.java	0% <0%> (ø)	⬆️

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[ashishkumar468]

Works fine for me, Thanks for the PR @neslihanturan