Add auto_id to build_condition for IUIA. (fix #904)

[Nomiram]

I have the same problem like #904 Allows use auto_id in .children() and .descendants()

[codecov[bot]]

Codecov Report

:x: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review. :white_check_mark: Project coverage is 88.00%. Comparing base (c23e64d) to head (04ff00e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1473      +/-   ##
==========================================
+ Coverage   87.98%   88.00%   +0.02%     
==========================================
  Files          60       60              
  Lines       22985    22987       +2     
==========================================
+ Hits        20223    20230       +7     
+ Misses       2762     2757       -5     

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