firebase_messaging updated from 14.7.3 to 14.7.4

[SamarS1ngh]

What kind of change does this PR introduce?
This PR updates firebase_messaging package from 14.7.3 to 14.7.4

Issue Number:
Fixed: #2097

Did you add tests for your changes?
No addtional test was required.

Summary
in issue #2097 , it was asked to upgrade the firebase_messaging package to the latest version (14.7.4) . So after cloning the project and getting all dependencies, I upgraded the required package.

Does this PR introduce a breaking change?
No

Have you read the contributing guide?
Yes

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e8129ce) 77.29% compared to head (aeeb36b) 77.29%.
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2123   +/-   ##
========================================
  Coverage    77.29%   77.29%           
========================================
  Files          152      152           
  Lines         7456     7456           
========================================
  Hits          5763     5763           
  Misses        1693     1693           

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