Migrate MultipleChoiceTaskFragment to use TaskScreen Component

[shobhitagarwal1612]

Towards #3630

• Introduce MultipleChoiceTaskScreen Composable to handle the UI.
• Update MultipleChoiceTaskFragment to use createComposeView and render the new MultipleChoiceTaskScreen.
• Replace MultipleChoiceTaskFragmentTest with MultipleChoiceTaskScreenTest and add more coverage

There is a pure refactor and doesn't cause any visual change.

@andreia-ferreira PTAL?

[codecov]

Codecov Report

❌ Patch coverage is 93.10345% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.72%. Comparing base (506ca77) to head (d57a6cc).

Files with missing lines	Patch %	Lines
...n/tasks/multiplechoice/MultipleChoiceTaskScreen.kt	91.66%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3652      +/-   ##
============================================
- Coverage     66.80%   66.72%   -0.08%     
+ Complexity     1631     1625       -6     
============================================
  Files           362      363       +1     
  Lines          8939     8957      +18     
  Branches       1144     1147       +3     
============================================
+ Hits           5972     5977       +5     
- Misses         2320     2329       +9     
- Partials        647      651       +4     

Files with missing lines	Coverage Δ
...tasks/multiplechoice/MultipleChoiceTaskFragment.kt	100.00% <100.00%> (+8.33%)	⬆️
...n/tasks/multiplechoice/MultipleChoiceTaskScreen.kt	91.66% <91.66%> (ø)

... and 5 files with indirect coverage changes

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