Fix #3540 : Merge lessons_chapter_view.xml into single xml file

[aayushimathur6]

Explanation

Fix #3540 : Merge lessons_chapter_view.xml into single xml file

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

If your PR includes UI-related changes, then:

• Add screenshots for portrait/landscape for both a tablet & phone of the before & after UI changes
• For the screenshots above, include both English and pseudo-localized (RTL) screenshots (see RTL guide)
• Add a video showing the full UX flow with a screen reader enabled (see accessibility guide)
• Add a screenshot demonstrating that you ran affected Espresso tests locally & that they're passing

BEFORE	AFTER

[rishidyno]

@aayushimathur6 PTAL can you please rearrange the image as they are not correct in their current state.

[rishidyno]

Also I think the image are incorrect please rectify them. Thanks!

[ayush0402]

Before screenshots for landscape modes are not correct. Rest seems to be fine.

[aayushimathur6]

corrected it, please check @ayush0402 @rishidyno !!

[ayush0402]

@aayushimathur6 LGTM, Thanks. Just a nit suggestion, try to keep screenshots for comparison to be of same size, you can use size attributes in markdown to fix it.

[ayush0402]

@rt4914 Please approve the workflows. Thanks.

[aayushimathur6]

okay @ayush0402 next time I will keep this in my mind

[rishidyno]

LGTM Thanks!

[rt4914]

@aayushimathur6 Your PR is 3 commits behind develop. Please update the develop on your fork and also update this branch. You can notice it says "3 commits behind oppia:develop"

Once its up-to-date all CI checks should pass.

[rt4914]

LGTM, thanks.

[aayushimathur6]

Hey @rt4914 please review my changes