fix(bottom nav): handle edge-to-edge

[ShaanNarendran]

Note

Assisted-by: GPT 5.6 for research

Purpose / Description

This PR adds the necessary insets so that there are no issues with displaying the nav bar in edge-to-edge displays.

Fixes

• Fixes Edge to edge: Fix more fragment destination (bottom nav bar) #21562

Approach

Adds the necessary insets, we calculate a fallback value for the initial height on the first run so that there are no rendering issues and then we later update it to the measured value.

How Has This Been Tested?

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[ShaanNarendran]

This also fixes the display everywhere including more, forgot to mention.

[github-actions]

Snapshot diff report vs main. Open screenshot-diff for diffs.

• DeckPickerScreenshotTest: 4 changes

All 4 changed screenshots

DeckPickerScreenshotTest

• hierarchy_lines_collapsed_compare.png
• hierarchy_lines_compare.png
• hierarchy_lines_deep_nesting_compare.png
• hierarchy_lines_many_siblings_compare.png

[david-allison]

You may wish to split these comments into separate PRs:

• Statistics needs handling
• More needs handling in landscape mode (obscured by the notch on the left of my phone)

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For these regressions, adding screenshot tests would be awesome, do feel free to defer the screenshot work to me if you wish.

[david-allison]

Should have requested changes here