refactor(Android, FormSheet v5): Introduce invalidation flags for updates

[t0maboro]

Description

Following the iOS architecture (which has distinct Presentation, Appearance, and Behavior providers along with update flags), this PR introduces an InvalidationFlags for FormSheetDialogManager on Android.

Instead of applying configuration changes when props change, the applyConfig method now evaluates what changed, raises the appropriate flags, and defers the actual execution to a coordinated flushPendingUpdates pass.

Note: as for iOS, reopening the sheet automatically invalidates both Appearance and Behavior. This ensures the native BottomSheetBehavior and layout are strictly synchronized with the React Native state, preventing stale configurations on re-mounts.

Changes

• Introduced FormSheetInvalidationFlags
• Replaced immediate actions with a state-diffing approach.
• All changes are now executed via flushPendingUpdates

Before & after - visual documentation

N/A - refactor

Test plan

N/A - refactor

Checklist

• Included code example that can be used to test this change.
• For visual changes, included screenshots / GIFs / recordings documenting the change.
• For API changes, updated relevant public types.
• Ensured that CI passes

[Copilot]

Pull request overview

This PR refactors the Android FormSheetDialogManager update flow to mirror the iOS “diff + invalidate + flush” architecture, introducing explicit invalidation flags and deferring all work into a single coordinated flushPendingUpdates() pass.

Changes:

• Added FormSheetInvalidationFlags to track presentation/appearance/behavior invalidations.
• Refactored applyConfig to compute invalidations instead of performing immediate side effects.
• Centralized update execution into flushPendingUpdates() with dedicated update helpers.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
android/src/main/java/com/swmansion/rnscreens/gamma/modals/formsheet/FormSheetInvalidationFlags.kt	Adds a new invalidation-flags holder for coordinating updates.
android/src/main/java/com/swmansion/rnscreens/gamma/modals/formsheet/FormSheetDialogManager.kt	Switches from immediate updates to invalidation + flush-based update execution.

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