Attempt to fix failed uploads

[misaochan]

Hopefully might fix #1485 . In cases where we cannot revalidate auth token during file upload, force user to re-login. (Similar to #1433)

I cannot test this as I can't reproduce the bug, but it builds successfully.

[codecov-io]

Codecov Report

Merging #1592 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #1592      +/-   ##
=========================================
- Coverage    3.87%   3.87%   -0.01%     
=========================================
  Files         150     150              
  Lines        7560    7567       +7     
  Branches      708     708              
=========================================
  Hits          293     293              
- Misses       7250    7257       +7     
  Partials       17      17

Impacted Files	Coverage Δ
...java/fr/free/nrw/commons/upload/UploadService.java	0% <0%> (ø)	⬆️
.../java/fr/free/nrw/commons/auth/SessionManager.java	15.38% <0%> (-1.29%)	⬇️
...n/java/fr/free/nrw/commons/auth/LoginActivity.java	0% <0%> (ø)	⬆️

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[maskaravivek]

These changes look good to me and would help in cases where authentication fails.

Should we also consider upload logging API failures(using logs API or keeping the logs on a wiki page), so that we know why the uploads are failing for various users.

[neslihanturan]

This should do the job @misaochan , thanks! I am also unable to reproduce the bug now but I did once, and then I reinstalled app for testing purposes and never experienced the bug again. So it is probably related with revalidation.