fix TabbedBrowsingTest.kt failure where Share Tabs element was not found

[nojunpark]

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues finished by this pull request are added to the milestone of the version currently in development.

[codecov-io]

Codecov Report

Merging #5282 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #5282      +/-   ##
============================================
+ Coverage     11.91%   11.93%   +0.02%     
  Complexity      245      245              
============================================
  Files           247      247              
  Lines         10231    10213      -18     
  Branches       1511     1507       -4     
============================================
  Hits           1219     1219              
+ Misses         8932     8914      -18     
  Partials         80       80

Impacted Files	Coverage Δ	Complexity Δ
.../java/org/mozilla/fenix/library/LibraryPageView.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...a/org/mozilla/fenix/library/history/HistoryView.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...lla/fenix/components/toolbar/BrowserToolbarView.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...rg/mozilla/fenix/library/bookmarks/BookmarkView.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
.../bookmarks/viewholders/BookmarkFolderViewHolder.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...ry/bookmarks/viewholders/BookmarkItemViewHolder.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3fda140...94e38cb. Read the comment docs.