refactor(app): refresh phone drawable assets

[Foxpace]

Refreshes phone drawable resources for the Compose-based interface.

What was added

• New back-navigation and expand-more vector icons.
• Historic and current launcher artwork updates.
• Updated GPS artwork used by the sensor UI.
• Removal of icons, backgrounds, dividers, and bundled fonts tied to legacy Views.

How it works

Compose screens load the retained vector and launcher resources through resource APIs and rely on Material styling for controls, dividers, shapes, and typography that previously required dedicated XML assets.

Stack position

Layer 14 of 31 in the SensorBox refactor stack. Review this PR against its configured base to see only this layer.

Validation

• Full stack: ./gradlew test — BUILD SUCCESSFUL (160 tasks)

[Foxpace]

Superseded by #46, which targets master and shows the final current tree. Closing this stacked layer so review stays on the consolidated diff; this PR remains available as history.

[Foxpace]

Stack restored at the author's request. This PR is again part of the original 31-layer refactor chain. The architecture work continues as stacked PRs #47 through #54; consolidated PR #46 is superseded.