Closes #16603: Disable pull down refresh when activity is in immersive mode

[rocketsroger]

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.

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[Amejia481]

Could we add add tests to avoid future regressions? :)

[rocketsroger]

Could we add add tests to avoid future regressions? :)

Agreed. My mistake, should have added a test.

[codecov-io]

Codecov Report

Merging #16793 (a153a8f) into master (5867d28) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #16793      +/-   ##
============================================
- Coverage     30.11%   30.09%   -0.03%     
+ Complexity     1211     1206       -5     
============================================
  Files           454      454              
  Lines         18606    18603       -3     
  Branches       2564     2566       +2     
============================================
- Hits           5604     5598       -6     
- Misses        12559    12563       +4     
+ Partials        443      442       -1     

Impacted Files	Coverage Δ	Complexity Δ
...a/org/mozilla/fenix/browser/BaseBrowserFragment.kt	9.62% <0.00%> (-0.02%)	11.00 <0.00> (ø)
...lla/fenix/customtabs/ExternalAppBrowserActivity.kt	33.33% <0.00%> (-5.56%)	4.00% <0.00%> (-5.00%)
...components/toolbar/BrowserToolbarMenuController.kt	73.80% <0.00%> (-0.31%)	0.00% <0.00%> (ø%)
...rc/main/java/org/mozilla/fenix/FenixApplication.kt	7.54% <0.00%> (ø)	5.00% <0.00%> (ø%)
...main/java/org/mozilla/fenix/tabtray/TabTrayView.kt	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)

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[Amejia481]

Awesome job 🚢 !