Update dependency com.google.android.gms:play-services-auth to v21.5.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.google.android.gms:play-services-auth	21.4.0 → 21.5.0

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.44%. Comparing base (96a0e2e) to head (cf7d37d).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4285   +/-   ##
========================================
  Coverage    46.43%   46.44%           
========================================
  Files          436      436           
  Lines        11770    11770           
  Branches      2038     2038           
========================================
+ Hits          5465     5466    +1     
  Misses        5720     5720           
+ Partials       585      584    -1     

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