feat: add synchronized version of methods into SyncedEnforcer

[damienmiheev]

Fix: #290

Functions added into SyncedEnforcer:

• addPolicies(List<List> rules)
• updatePolicy(List params1, List params2)
• addPolicies(String[][] rules)
• addNamedPolicies(String ptype, List<List> rules)
• updateNamedPolicy(String ptype, List params1, List params2)
• updateGroupingPolicy(List params1, List params2)
• updateNamedGroupingPolicy(String ptype, List params1, List params2)
• removePolicies(List<List> rules)
• removePolicies(String[][] rules)
• removeNamedPolicies(String ptype, List<List> rules)
• addGroupingPolicies(List<List> rules)
• addGroupingPolicies(String[][] rules)
• addNamedGroupingPolicies(String ptype, List<List> rules)
• addNamedGroupingPolicies(String ptype, String[][] rules)
• removeGroupingPolicies(List<List> rules)
• removeGroupingPolicies(String[][] rules)
• removeNamedGroupingPolicies(String ptype, List<List> rules)
• removeNamedGroupingPolicies(String ptype, String[][] rules)

Also added private methods to reduce number of thread-lock related duplication code.

[CLAassistant]

All committers have signed the CLA.

[casbin-bot]

@tangyang9464 @imp2002 please review

[hsluoyz]

@damienmiheev plz fix:

[codecov-commenter]

Codecov Report

Merging #291 (ffedddc) into master (f5e38b6) will increase coverage by 1.55%.
The diff coverage is 62.13%.

@@            Coverage Diff             @@
##           master     #291      +/-   ##
==========================================
+ Coverage   67.95%   69.51%   +1.55%     
==========================================
  Files          47       47              
  Lines        2375     2168     -207     
  Branches      405      405              
==========================================
- Hits         1614     1507     -107     
+ Misses        647      547     -100     
  Partials      114      114              

Impacted Files	Coverage Δ
...n/java/org/casbin/jcasbin/main/SyncedEnforcer.java	66.66% <62.13%> (+9.22%)	⬆️

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[hsluoyz]

@tangyang9464 @seriouszyx @imp2002 plz review

[tangyang9464]

LGTM

[github-actions]

🎉 This PR is included in version 1.28.0 🎉

The release is available on:

• GitHub release
• v1.28.0

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