ItemSelectionInteraction text change on selection

EDIT (by @seanlip): See updated description here – https://github.com/oppia/oppia-android/issues/3169#issuecomment-1225305069

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Previous description

Mock1

As per Mock1, by default the text is Please select atleast one choice.. If atleast one option is selected we hide this text and if the option is deselected then we show this text again.

Add this functionality and its relevant test.

Expected Cases:

1. No item selected - Default Text - Please select one or more choices.
2. If total selection count is atleast 1 and less than allowable selections, change text to You may select more choices.
3. If total selection count is equal to allowable selections, change text to No more than 4 choices may be selected.

You can experiment similar cases on What is a Fraction? . You will need to answer a lot of states before you will reach a state where you will find this interaction where you can select multiple options.

[sanchi0204]

Can I work on this?

[priyanka0906]

@priyanka0906 Let me know if you are still working on this, or we can unassign and look for other interesting issues.

@anandwana001 I am currently not working on this.