chore: update Composables Core to 1.49.6

[leonelgalan]

Summary

Bumps com.composables:core from 1.37.0 to 1.49.6 so the SDK stays compatible
with Expo SDK 56. No source or behavioral changes.

Why

Expo SDK 56's development client (expo-dev-launcher / expo-dev-menu) ships
com.composables:core 1.49.x. In a dev-client build Gradle resolves the dependency
to the higher version, and because io.rownd:android is compiled against the 1.37.0
Sheet(...) signature, the auth bottom sheet crashes at runtime:

java.lang.NoSuchMethodError: No static method Sheet-bogVsAg(...) in
com.composables.core.ModalBottomSheetKt
    at io.rownd.android.views.ComposableBottomSheet

Change

• android/build.gradle: com.composables:core 1.37.0 → 1.49.6

The Compose Unstyled API used by ComposableBottomSheet (ModalBottomSheet, Sheet,
Scrim, SheetDetent, rememberModalBottomSheetState) is source-compatible across
these versions — the SDK compiles unchanged and there are no public API or behavioral
changes. Resolves the binary signature mismatch by recompiling against 1.49.6.

[qodo-code-review]

Code Review by Qodo

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