fix(android): reserve navigation bar slot for drawer

[jsdatarocks]

Description

Summary

Opts the Android drawer root host into the navigation bar slot reservation API introduced by NativePHP/mobile-air#404.

Together, the two changes prevent the drawer button from overlapping the navigation title while preserving the drawer's current overlay implementation.

Problem

On Android, the mobile-ui drawer button is rendered as an overlay at the top-left of the root content. The mobile-air TopAppBar previously reserved its navigation slot only for a back button, so a root screen with a drawer and no back button placed the navigation title underneath the drawer icon.

iOS already positions the drawer button and title without this overlap.

Changes

• Registers the native-ui.drawer root host with reservesNavigationBarSlot = true.
• Leaves the existing drawer rendering and behavior unchanged.
• Allows the companion mobile-air implementation to reserve a 48.dp navigation slot while the native_drawer sentinel is present and no back button is shown.

Dependency and rollout

This PR depends on NativePHP/mobile-air#404, which adds the reservesNavigationBarSlot registration parameter and handles the reserved slot in the stack and tab root renderers.

The changes should be merged and released in this order:

1. NativePHP/mobile-air#404.
2. This mobile-ui PR.

The updated mobile-ui source will not compile against a mobile-air version that does not yet provide the new register() parameter.

Testing

The companion mobile-air PR includes registry unit coverage and Compose layout tests for both stack and tab root renderers. This PR adds a Pest contract test that verifies the Android drawer registration consumes native_drawer and enables reservesNavigationBarSlot.

The combined changes should be manually verified on Android with:

• Tab and stack layouts using a drawer.
• Root screens without a back button.
• Nested screens with a back button.
• Navigation bars with and without trailing actions.
• Short and long titles.
• Hidden navigation bars.
• Both modal and reveal drawer variants.