Migrate NumberTaskFragment to use TaskScreen Component

[shobhitagarwal1612]

Towards #3630

• Introduce NumberTaskScreen Composable to handle the UI.
• Update NumberTaskFragment to use createComposeView and render the new NumberTaskScreen.
• Replace NumberTaskFragmentTest with NumberTaskScreenTest and add more coverage

Screen_recording_20260401_195708.webm

@andreia-ferreira PTAL?

[codecov]

Codecov Report

❌ Patch coverage is 67.85714% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.89%. Comparing base (e6ca258) to head (043afe5).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
.../datacollection/tasks/number/NumberTaskFragment.kt	0.00%	5 Missing ⚠️
...ui/datacollection/tasks/number/NumberTaskScreen.kt	82.60%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3650      +/-   ##
============================================
- Coverage     66.94%   66.89%   -0.06%     
+ Complexity     1639     1633       -6     
============================================
  Files           359      360       +1     
  Lines          8867     8886      +19     
  Branches       1137     1140       +3     
============================================
+ Hits           5936     5944       +8     
- Misses         2287     2297      +10     
- Partials        644      645       +1     

Files with missing lines	Coverage Δ
...ui/datacollection/tasks/number/NumberTaskScreen.kt	82.60% <82.60%> (ø)
.../datacollection/tasks/number/NumberTaskFragment.kt	0.00% <0.00%> (-90.00%)	⬇️

... and 2 files with indirect coverage changes

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