fix: Properly handle spacing for spinner checkmarks

[david-allison]

Note

Assisted-by: Claude Fable 5 - all (comments modified)

Purpose / Description

Fixes a TODO

Fixes

• Fixes Properly handle spacing for spinner checkmarks #21030

Approach

• use InsetDrawable (8dp) - using a ldrtl override for RTL handling

How Has This Been Tested?

Before

After

RTL

Learning (optional, can help others)

ldrtl = layour direction; right to left

Checklist

• 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

[github-actions]

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

• DeckPickerScreenshotTest: 2 changes

All 2 changed screenshots

DeckPickerScreenshotTest

• hierarchy_lines_collapsed_compare.png
• hierarchy_lines_compare.png