fix: time interval unit UI

[Dishebh]

Fixes #2188

Changes

• Fixes time interval Unit UI so it shows up correctly in portrait mode

Screenshots / Recordings

• Landscape Mode

• Portrait Mode

Checklist:

• [ ] No hard coding: I have used resources from strings.xml, dimens.xml and colors.xml without hard coding any value.
• [ ] No end of file edits: No modifications done at end of resource files strings.xml, dimens.xml or colors.xml.
• [ ] Code reformatting: I have reformatted code and fixed indentation in every file included in this pull request.
• [ ] No extra space: My code does not contain any extra lines or extra spaces than the ones that are necessary.

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[Dishebh]

cc @marcnause @AsCress

[github-actions[bot]]

Build successful. APKs to test: https://github.com/fossasia/pslab-android/actions/runs/11644641928/artifacts/2136653247

[CloudyPadmal]

I'm closing this as the target branch is native and we are now focusing on flutter.