fix: hide closed sheets below edge-to-edge containers

[huytdps13400]

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Motivation

Fixes #2747.

On Android edge-to-edge devices, Dimensions.get('window').height can exclude system bars while the measured sheet container spans the full screen. A sheet mounted permanently at index={-1} can therefore start above its real closed detent and leave its handle visible.

Initialize the Android position from screen.height, which stays at or below the full-screen container edge. Keep the existing window.height behavior on iOS and web so their mount-animation starting point is unchanged.

Verification

• RED invariant harness against master: failed while the initial position used window.height
• GREEN invariant harness: Android selects screen.height, other platforms select window.height
• yarn typescript
• yarn build
• yarn biome check --error-on-warnings src/components/bottomSheet/BottomSheet.tsx
• git diff --check

Repository-wide yarn lint still reports the existing unrelated optional-chain warning in src/hooks/useBoundingClientRect.ts:54; the changed file is clean.

I could not run the hardware-specific Samsung edge-to-edge reproduction locally. The patch matches the measured window < container == screen geometry and keeps the non-Android path unchanged.