fix(timepicker): correctly set initial time manually

[valorkin]

PR Checklist

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• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.
• added/updated tests.
• added/updated API documentation.
• added/updated demos.

[codecov]

Codecov Report

Merging #2945 into development will increase coverage by 0.03%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##           development    #2945      +/-   ##
===============================================
+ Coverage         70.7%   70.73%   +0.03%     
===============================================
  Files              137      137              
  Lines             4165     4166       +1     
  Branches           737      738       +1     
===============================================
+ Hits              2945     2947       +2     
  Misses             914      914              
+ Partials           306      305       -1

Impacted Files	Coverage Δ
src/timepicker/timepicker.component.ts	91.5% <100%> (+0.08%)	⬆️
src/timepicker/timepicker.utils.ts	93.75% <0%> (+1.25%)	⬆️

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[YevheniiaMazur]

Tested, looks good