[Android] Made context menu option 'Open in new tab' visible

[samartnik]

Resolves brave/brave-browser#15120

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

[SergeyZhukovsky]

++

[kjozwiak]

Verification PASSED on Pixel 6 running Android 12 using 1.37.58 Chromium: 99.0.4844.35

• ensured that opening links via Open in new tab on websites via the context menu works as expected
• ensured that tabs opened via Open in new tab are visible in the tab grid layout
• ensured that tabs opened via Open in new tab can be closed via the tab grid layout without issues
• ensured that a tab that's active and opened via Open in new tab stays active after several restarts
• ensured that tabs opened via Open in new tab are retained after restarting the browser several times
• ensured that openings tabs within PB using Open in new tab doesn't appear in History
• ensured that you can open tabs using Open in new tab within PB mode without any issues
• ensured that opening a new tab within a group using Open in new tab opens an independent tab
• ensured that tabs opened via Open in new tab can be moved into group tabs via the tab grid layout
• ensured that Open in new tab moved into a tab group and be removed without any issues
• ensured Open in new tab works via Top Tiles