Implement new proto param to allow Other sellection as a conditional expression

[andreia-ferreira]

Fixes #3821

This PR updates the Ground platform commit to a newer one containing changes to the MultipleChoiceSelection proto. The new parameter other_selected allows the selection of the 'Other' option to be used for conditional tasks.
A database auto migration was also added in order to insert the new column, which defaults to false for existing surveys.

Screen_recording_20260710_152345.webm

@shobhitagarwal1612 PTAL?

[codecov]

Codecov Report

❌ Patch coverage is 46.15385% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 67.48%. Comparing base (31b524c) to head (3c28bbf).

Files with missing lines	Patch %	Lines
.../org/groundplatform/domain/model/task/Condition.kt	0.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3832      +/-   ##
============================================
- Coverage     67.49%   67.48%   -0.01%     
- Complexity     1797     1798       +1     
============================================
  Files           405      405              
  Lines         10625    10632       +7     
  Branches       1356     1358       +2     
============================================
+ Hits           7171     7175       +4     
- Misses         2756     2759       +3     
  Partials        698      698              

Files with missing lines	Coverage Δ
...ava/org/groundplatform/android/common/Constants.kt	100.00% <ø> (ø)
...dplatform/android/data/local/room/LocalDatabase.kt	100.00% <ø> (ø)
.../android/data/local/room/converter/ConverterExt.kt	84.33% <100.00%> (+0.10%)	⬆️
...android/data/local/room/entity/ExpressionEntity.kt	100.00% <100.00%> (ø)
.../data/remote/firebase/schema/ConditionConverter.kt	100.00% <100.00%> (ø)
.../org/groundplatform/domain/model/task/Condition.kt	0.00% <0.00%> (ø)

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