feat(coinjoin): mix balance

[HashEngineering]

Issue being fixed or feature implemented

What was done?

How Has This Been Tested?

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[codecov]

Codecov Report

Attention: 29 lines in your changes are missing coverage. Please review.

Comparison is base (c25f04c) 49.08% compared to head (4ee4d6f) 48.79%.

❗ Current head 4ee4d6f differs from pull request most recent head 467a19f. Consider uploading reports for the commit 467a19f to get more accurate results

Files	Patch %	Lines
...in/java/org/bitcoinj/wallet/CoinJoinExtension.java	0.00%	13 Missing ⚠️
...a/org/bitcoinj/coinjoin/CoinJoinClientSession.java	52.94%	6 Missing and 2 partials ⚠️
...re/src/main/java/org/bitcoinj/wallet/WalletEx.java	0.00%	2 Missing and 2 partials ⚠️
...a/org/bitcoinj/coinjoin/CoinJoinClientOptions.java	0.00%	2 Missing ⚠️
...a/org/bitcoinj/coinjoin/CoinJoinClientManager.java	90.00%	0 Missing and 1 partial ⚠️
.../bitcoinj/coinjoin/CoinJoinClientQueueManager.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##             feature-coinjoin     #235      +/-   ##
======================================================
- Coverage               49.08%   48.79%   -0.29%     
+ Complexity               7461     7414      -47     
======================================================
  Files                     453      453              
  Lines                   49973    49989      +16     
  Branches                 7114     7119       +5     
======================================================
- Hits                    24529    24392     -137     
- Misses                  22680    22865     +185     
+ Partials                 2764     2732      -32     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Syn-McJ]

Looks good