refactor(wear): remove legacy activities

[Foxpace]

Removes the old wearable activity-per-screen navigation model and leaves lightweight entry points for Compose.

What was added

• Removal of legacy settings, maps, permission, sensor-picker, and stop activities.
• Simplified MainActivity and MoveToMain entry behavior.

How it works

The remaining entry activity hosts the Compose navigation flow. Dashboard state and typed effects now choose menus, permissions, sensor views, recording actions, and phone launch behavior without starting a separate Android activity for every screen.

Stack position

Layer 19 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Superseded by #46, which targets master and shows the final current tree.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 The architecture work continues as stacked PRs #47 through #54; consolidated PR #46 is superseded.