Add checks to force RTL layout attributes.

[BenHenning]

Explanation

Forces RTL attributes by introducing regex check patterns to prohibit all listed on this table, plus some I found when digging into ConstraintLayout specifically.

Reviewer: Please verify that:

1. This list looks correct to you as valid cases to prohibit
2. That the list of exemptions are real cases that need to be fixed

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.

[BenHenning]

@rt4914 PTAL at the new checks being added & let me know if any of these seem wrong to you, plus that the exemptions are cases to fix.

[rt4914]

Looks really nice to me. Thanks a lot. Let me know once merged so that we can file good-first-issues for the exempted files.

[oppiabot]

Hi @BenHenning, this PR is ready to be merged. Please address any remaining comments prior to merging, and feel free to merge this PR once the CI checks pass and you're happy with it. Thanks!

[BenHenning]

Done @rt4914 -- now merged.