[#12883] Update agent unmodifiableFilter of transform

[jaehong-kim]

#12883

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 33.55%. Comparing base (f1dcef8) to head (c0708d1).
⚠️ Report is 905 commits behind head on master.

Files with missing lines	Patch %	Lines
.../profiler/transformer/UnmodifiableClassFilter.java	0.00%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             master   #12907    +/-   ##
==========================================
  Coverage     33.54%   33.55%            
+ Complexity    10842    10823    -19     
==========================================
  Files          3967     3956    -11     
  Lines         92557    92332   -225     
  Branches       9678     9668    -10     
==========================================
- Hits          31051    30981    -70     
+ Misses        58838    58689   -149     
+ Partials       2668     2662     -6     

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[Dongnyoung]

@jaehong-kim
I added a small test-only PR to cover the newly added jdk/* branch,
which fixes the Codecov patch coverage failure.

PR: #13398