GH-3365 fix typed data issue

[DmitryBespalov]

Handles #3365

Changes proposed in this pull request:

• MetaMask doesn't produce correct signature if the 'data' in the "0x" format. When it is an empty string, the signature is correct.
• Other wallets seem to support the empty string "" as well.

[codecov-commenter]

Codecov Report

Attention: 761 lines in your changes are missing coverage. Please review.

Comparison is base (2b3ddf0) 8.14% compared to head (6793ee2) 8.03%.
Report is 24 commits behind head on main.

Files	Patch %	Lines
...Connect to Web/Logic/WebConnectionController.swift	0.00%	234 Missing ⚠️
...sViewController/TransactionDetailCellBuilder.swift	0.00%	102 Missing ⚠️
Multisig/Logic/Models/EIP712Transformer.swift	0.00%	70 Missing ⚠️
...cureConfig/Sources/SecureConfig/SecureConfig.swift	0.00%	59 Missing ⚠️
... Web/Logic/WebConnectionToSessionTransformer.swift	0.00%	49 Missing ⚠️
...ntroller/ReviewSafeTransactionViewController.swift	0.00%	49 Missing ⚠️
...Connect to Web/Logic/WebConnectionRepository.swift	0.00%	44 Missing ⚠️
...let/UI/SendTransactionToWalletViewController.swift	0.00%	19 Missing ⚠️
...isig/Cross-layer/Configuration/Configuration.swift	0.00%	17 Missing ⚠️
Multisig/App/SceneDelegate.swift	0.00%	16 Missing ⚠️
... and 19 more

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Additional details and impacted files

@@           Coverage Diff            @@
##            main   #3374      +/-   ##
========================================
- Coverage   8.14%   8.03%   -0.11%     
========================================
  Files        786     788       +2     
  Lines      43371   43946     +575     
========================================
  Hits        3532    3532              
- Misses     39839   40414     +575     

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