fix: prevent double top bars in non-system themes

[naveensingh]

Type of change(s)

• Bug fix
• Feature / enhancement
• Infrastructure / tooling (CI, build, deps, tests)
• Documentation

What changed and why

• Set windowActionModeOverlay to true in other themes as well. The app bar layout was being pushed down because of this in non-system themes, creating double top bars.

Tests performed

• Selection mode in all themes

Closes the following issue(s)

• Not tracked. This appeared due to inset related changes.

Checklist

• I read the contribution guidelines.
• I manually tested my changes on device/emulator (if applicable).
• I updated the "Unreleased" section in CHANGELOG.md (if applicable).
• I have self-reviewed my pull request (no typos, formatting errors, etc.).
• All checks are passing.