Remove GITHUB_TOKEN, build with Gradle configuration

[seabornlee]

[github-actions]

Pull reviewers stats

Stats of the last 30 days for alpha-wallet-android:

	User	Total reviews	Time to review	Total comments
	JamesSmartCell 🥇	8 ▀▀▀▀▀	23h 11m ▀▀▀	13 ▀▀▀▀▀▀▀
	seabornlee 🥈	7 ▀▀▀▀	2h 19m	7 ▀▀▀▀
	justindg 🥉	1 ▀	1d 19h 5m ▀▀▀▀▀▀	0

[codecov]

Codecov Report

Base: 7.41% // Head: 7.41% // No change to project coverage 👍

Coverage data is based on head (3accfb9) compared to base (5746c1e).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff            @@
##             master   #2796   +/-   ##
========================================
  Coverage      7.41%   7.41%           
  Complexity      779     779           
========================================
  Files           575     575           
  Lines         40601   40601           
  Branches       4133    4133           
========================================
  Hits           3011    3011           
  Misses        37334   37334           
  Partials        256     256           

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