fix(net):optimize sync service

[jwrct]

What does this PR do?
Fix the issue of repeatedly requesting blocks.

Why are these changes required?

This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details

[codecov-commenter]

Codecov Report

Merging #5234 (c8b9d1a) into release_v4.7.2 (dcf8982) will increase coverage by 0.05%.
The diff coverage is 60.00%.

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@@                 Coverage Diff                  @@
##             release_v4.7.2    #5234      +/-   ##
====================================================
+ Coverage             60.39%   60.45%   +0.05%     
- Complexity             9003     9008       +5     
====================================================
  Files                   836      836              
  Lines                 49681    49685       +4     
  Branches               5529     5530       +1     
====================================================
+ Hits                  30007    30035      +28     
+ Misses                17303    17273      -30     
- Partials               2371     2377       +6     

Impacted Files	Coverage Δ
...va/org/tron/core/net/service/sync/SyncService.java	58.97% <50.00%> (-0.41%)	⬇️
.../tron/core/net/messagehandler/BlockMsgHandler.java	51.19% <100.00%> (+0.58%)	⬆️

... and 12 files with indirect coverage changes

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