Add unit test for EIP5169 Certificate

[JamesSmartCell]

• Normalise formatting in AssetDefinitionService
• Small refactor and add unit test

[github-actions]

Pull reviewers stats

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

	User	Total reviews	Time to review	Total comments
	JamesSmartCell 🥇	9 ▀▀▀▀▀	20h 27m ▀▀▀	13 ▀▀▀▀▀▀▀
	seabornlee 🥈	7 ▀▀▀▀	2h 19m	7 ▀▀▀▀
	justindg 🥉	1 ▀	1d 19h 5m ▀▀▀▀▀▀▀	0

[codecov]

Codecov Report

Base: 7.41% // Head: 7.41% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (f5e71b2) compared to base (5746c1e).
Patch coverage: 4.59% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff            @@
##             master   #2797   +/-   ##
========================================
  Coverage      7.41%   7.41%           
  Complexity      779     779           
========================================
  Files           575     575           
  Lines         40601   40624   +23     
  Branches       4133    4133           
========================================
+ Hits           3011    3014    +3     
- Misses        37334   37354   +20     
  Partials        256     256           

Impacted Files	Coverage Δ
.../src/main/java/com/alphawallet/app/util/Utils.java	9.06% <0.00%> (ø)
...lphawallet/app/service/AssetDefinitionService.java	6.13% <4.70%> (+0.12%)	⬆️
...va/com/alphawallet/app/service/OpenSeaService.java	7.60% <0.00%> (ø)
...va/com/alphawallet/app/ui/ImportTokenActivity.java	0.00% <0.00%> (ø)
...llet/app/repository/EthereumNetworkRepository.java	16.66% <0.00%> (ø)

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