add kwargs error_ok for screenshot

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Codecov Report

Attention: Patch coverage is 43.24324% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 32.07%. Comparing base (c8e6235) to head (6e6793f). Report is 1 commits behind head on master.

Files	Patch %	Lines
adbutils/screenshot.py	50.00%	10 Missing :warning:
adbutils/shell.py	38.46%	8 Missing :warning:
adbutils/_adb.py	25.00%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #118      +/-   ##
==========================================
+ Coverage   30.35%   32.07%   +1.72%     
==========================================
  Files          15       15              
  Lines        1980     2017      +37     
  Branches      315      324       +9     
==========================================
+ Hits          601      647      +46     
+ Misses       1360     1345      -15     
- Partials       19       25       +6     

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