Closes #5403: Add setDynamicToolbarMaxHeight to EngineViewBottomBehavior

[jonalmeida]

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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

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.

[codecov]

Codecov Report

Merging #5404 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #5404      +/-   ##
============================================
- Coverage     80.34%   80.34%   -0.01%     
+ Complexity     4225     4223       -2     
============================================
  Files           547      546       -1     
  Lines         19230    19198      -32     
  Branches       2778     2775       -3     
============================================
- Hits          15451    15425      -26     
+ Misses         2618     2614       -4     
+ Partials       1161     1159       -2

Impacted Files	Coverage Δ	Complexity Δ
...ature/session/behavior/EngineViewBottomBehavior.kt	87.5% <0%> (ø)	4 <0> (ø)	⬇️
...ozilla/components/feature/search/SearchUseCases.kt
...components/support/migration/FennecFxaMigration.kt	96.73% <0%> (+0.18%)	10% <0%> (ø)	⬇️

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[jonalmeida]

@hiikezoe had concerns that this was not the right way to solve the toolbar bug. We should probably be telling the toolbar when it shouldn't scroll away when web content is fixed.

See mozilla-mobile/reference-browser#975 (comment) for the discussion.