fix: optimize enforce method by moving common code before 'for' loop

[kdebski85]

Fix: https://github.com/casbin/jcasbin/issues/336

Optimize enforce method by moving common code before 'for' loop. BenchmarkABACModel shows about 7 per cent decrease of average operation time. Make InternalEnforcerWithDispatcherTest.java compile under Java 17.

[casbin-bot]

@tangyang9464 @imp2002 please review

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #341 (006645f) into master (5cb8846) will increase coverage by 0.28%. The diff coverage is 86.36%.

@@            Coverage Diff             @@
##           master     #341      +/-   ##
==========================================
+ Coverage   69.04%   69.33%   +0.28%     
==========================================
  Files          48       48              
  Lines        2213     2214       +1     
  Branches      409      409              
==========================================
+ Hits         1528     1535       +7     
+ Misses        566      561       -5     
+ Partials      119      118       -1     

Impacted Files	Coverage Δ
...ain/java/org/casbin/jcasbin/main/CoreEnforcer.java	76.92% <86.36%> (+0.08%)	:arrow_up:

... and 1 file with indirect coverage changes

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[hsluoyz]

@aryalrabin @PokIsemaine plz review

[github-actions[bot]]

:tada: This PR is included in version 1.32.4 :tada:

The release is available on:

• GitHub release
• v1.32.4

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