[Master] Fix the warnings in native-image build

[TharmiganK]

Purpose

Related to : ballerina-platform/ballerina-library#3861

Examples

N/A

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility

[codecov]

Codecov Report

Base: 81.07% // Head: 81.12% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (e54b8a6) compared to base (d2407df).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1388      +/-   ##
============================================
+ Coverage     81.07%   81.12%   +0.04%     
  Complexity      140      140              
============================================
  Files           362      362              
  Lines         19631    19631              
  Branches       4323     4323              
============================================
+ Hits          15916    15925       +9     
+ Misses         2875     2868       -7     
+ Partials        840      838       -2     

Impacted Files	Coverage Δ
...contractimpl/sender/http2/RequestWriteStarter.java	87.09% <0.00%> (-6.46%)	⬇️
...nsport/contractimpl/DefaultHttpResponseFuture.java	75.30% <0.00%> (+0.61%)	⬆️
...nsport/contractimpl/Http2OutboundRespListener.java	78.80% <0.00%> (+1.32%)	⬆️
...mpl/sender/states/http2/WaitingFor100Continue.java	68.42% <0.00%> (+8.77%)	⬆️
...sport/message/ServerRemoteFlowControlListener.java	75.00% <0.00%> (+12.50%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.