For #4744 - Extract TransitionPreDrawListener

[NotWoods]

Extracts the onPreDraw listener from HomeFragment.

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
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

[codecov-io]

Codecov Report

Merging #4812 into master will increase coverage by 0.02%.
The diff coverage is 19.04%.

@@             Coverage Diff             @@
##             master   #4812      +/-   ##
===========================================
+ Coverage      6.37%    6.4%   +0.02%     
- Complexity      154     157       +3     
===========================================
  Files           205     206       +1     
  Lines          9022    9027       +5     
  Branches       1358    1357       -1     
===========================================
+ Hits            575     578       +3     
- Misses         8401    8403       +2     
  Partials         46      46

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/org/mozilla/fenix/home/HomeFragment.kt	0% <0%> (ø)	0 <0> (ø)	⬇️
...rg/mozilla/fenix/home/TransitionPreDrawListener.kt	33.33% <33.33%> (ø)	3 <3> (?)
app/src/main/java/org/mozilla/fenix/ext/Context.kt	12% <0%> (-4%)	0% <0%> (ø)

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