Closes #12778: re-arranged steps to follow current flow in closeTabTest & closePrivateTabTest

[sv-ohorvath]

The tabs drawer is hidden after closing the last tab so you need to re-open the tab drawer to see the tab restore with Undo.

Pull Request checklist

• 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. In addition, it includes a screenshot of a successful accessibility scan to ensure no new defects are added to the product.

After merge

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

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[AaronMT]

Makes sense. Thanks. Looks good to me.

[codecov-commenter]

Codecov Report

Merging #13810 into master will decrease coverage by 0.09%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #13810      +/-   ##
============================================
- Coverage     28.39%   28.29%   -0.10%     
+ Complexity     1050     1048       -2     
============================================
  Files           421      421              
  Lines         17145    17188      +43     
  Branches       2233     2238       +5     
============================================
- Hits           4868     4864       -4     
- Misses        11929    11975      +46     
- Partials        348      349       +1     

Impacted Files	Coverage Δ	Complexity Δ
...in/java/org/mozilla/fenix/settings/SupportUtils.kt	71.42% <0.00%> (-4.09%)	11.00% <0.00%> (-2.00%)
...mponents/searchengine/FenixSearchEngineProvider.kt	62.16% <0.00%> (-1.81%)	13.00% <0.00%> (ø%)
...in/java/org/mozilla/fenix/search/SearchFragment.kt	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)

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