fix part of #4839 Hint dialog can show up during answer input and interrupt the user's experience

[ShubhadeepKarmakar]

Explanation

• fix part of Hint dialog can show up during answer input and interrupt the user's experience #4839

Essential Checklist

• The PR title and explanation each start with "Fix #bugnum: " (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• Any changes to scripts/assets files have their rationale included in the PR explanation.
• The PR follows the style guide.
• The PR does not contain any unnecessary code changes from Android Studio (reference).
• The PR is made from a branch that's not called "develop" and is up-to-date with "develop".
• The PR is assigned to the appropriate reviewers (reference).

For UI-specific PRs only

Result:

1.mp4

[adhiamboperes]

Hi @ShubhadeepKarmakar, is this ready for a review?

Since this is covering only part of the issue, could you please add a description of the part fixed by this PR and assign to me.

[oppiabot]

Hi @ShubhadeepKarmakar, I'm going to mark this PR as stale because it hasn't had any updates for 7 days. If no further activity occurs within 7 days, it will be automatically closed so that others can take up the issue.
If you are still working on this PR, please make a follow-up commit within 3 days (and submit it for review, if applicable). Please also let us know if you are stuck so we can help you!

[oppiabot]

Hi @ShubhadeepKarmakar, I'm going to mark this PR as stale because it hasn't had any updates for 7 days. If no further activity occurs within 7 days, it will be automatically closed so that others can take up the issue.
If you are still working on this PR, please make a follow-up commit within 3 days (and submit it for review, if applicable). Please also let us know if you are stuck so we can help you!