Fix #3473 #3545 #3588 : Merge faq_list_fragment, ongoing_topic_item and topic_revision_summary_view

[rt4914]

Explanation

Fix #3473 : Merge faq_list_fragment - In this only the un-required attributes were removed, otherwise the code is already optimised.
Fix #3545 : Merge ongoing_topic_item
Fix #3588 : Merge topic_revision_summary_view

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).

Before and After Screenshots

[github-actions]

Thanks for submitting this pull request! Some main reviewers
have taken time off for the next few weeks, so it may take a
little while before we can look at this PR. We appreciate your
patience while some of our team members recharge. We'll be fully
returning on 23 May 2022.

[rt4914]

These margins are not required anymore because correct constraints have been added at bottom.

[oppiabot]

Hi @rt4914, 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!

[MohitGupta121]

It's look good to me.
It able to merge.

[seanlip]

Merging per @rt4914's request.