Fix #3266: [RTL] High-fi Image from rich text is center aligned in Exploration Player.

[veena14cs]

Explanation

This PR fixes #3266 . This Pr fixes the image alignment to the center rendered from rich text in exploration player.

Document Reference
https://docs.google.com/document/d/1Fl1ar5vcdLvay7ZIJLUFQro1wEf1yUEicwF-CKcvwJ0/edit#heading=h.rfpqdmwhi6tn

Screenshot (LTR and RTL)

Mobile View

.....

.....

Tablet View
.....
.....

Screenshot of testcases with RTL code

Screenshot of testcases without RTL code

Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• The PR explanation includes the words "Fixes #bugnum: ..." (or "Fixes part of #bugnum" if the PR only partially fixes an issue).
• The PR follows the style guide.
• The PR does not contain any unnecessary auto-generated code from Android Studio.
• The PR is made from a branch that's not called "develop".
• The PR is made from a branch that is up-to-date with "develop".
• The PR's branch is based on "develop" and not on any other branch.
• The PR is assigned to an appropriate reviewer in both the Assignees and the Reviewers sections.

[rt4914]

@veena14cs PTAL

[rt4914]

@veena14cs as per our initial conversation we should not use any attributes like textAlignment, textDirection, etc. I think for this PR it needs to be solved in HTMLParser or related files.

[veena14cs]

Removed from xml file and added this programmatically, if RTL is enabled.

[veena14cs]

2. Could you add a screenshot to the opening comment showing HtmlParserTest passing on Espresso?

There are few old tests that are failing in Expresso. I have also tested this in develop code they failing in develop as well. Do you have any idea on this? Or there is any issue tracking this?

[veena14cs]

Thanks @veena14cs! PR generally LGTM, but:

1. I had one question about the de-flake code you added--PTAL
2. Could you add a screenshot to the opening comment showing HtmlParserTest passing on Espresso?
3. Per the label Sparsh added, could you update this to the latest develop?

I have updated code with latest develop.

[BenHenning]

Thanks @veena14cs! Generally LGTM, but there appears to be dead code to remove.

Regarding the already failing Espresso tests, I don't think that's expected & I'm not aware of a tracking issue. I think we can ignore them for the sake of this PR (it's known that many Espresso tests are in a failing state, and it's hard to resolve them since we can't yet run them in CI).

[veena14cs]

Thanks @veena14cs! Generally LGTM, but there appears to be dead code to remove.

Regarding the already failing Espresso tests, I don't think that's expected & I'm not aware of a tracking issue. I think we can ignore them for the sake of this PR (it's known that many Espresso tests are in a failing state, and it's hard to resolve them since we can't yet run them in CI).

Well in that case I can wrap this PR. I have removed the dead code. Please check.

[BenHenning]

Thanks @veena14cs! LGTM.