feat: Add native tap-to-focus reset listener

[mrousavy]

Summary

• add addOnFocusResetListener to the native tap-to-focus gesture controller
• emit after MeteringTask successfully performs its automatic reset on iOS
• explicitly schedule and await CameraX focus cancellation on Android so reset completion is observable
• invalidate pending automatic resets when a newer focus or manual reset supersedes the gesture

This PR is stacked on #4172. It intentionally reports automatic resets from native tap-to-focus gestures only; failed or superseded resets do not emit.

Test plan

• bun camera specs
• bun run lint-all
• bun camera typecheck
• bun camera build
• ./apps/simple-camera/android/gradlew -p apps/simple-camera/android :react-native-vision-camera:assembleDebug --no-daemon --console=plain
• xcodebuild -workspace SimpleCamera.xcworkspace -scheme VisionCamera -sdk iphonesimulator -configuration Debug -destination 'generic/platform=iOS Simulator' -derivedDataPath build CODE_SIGNING_ALLOWED=NO build -quiet

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Project	Deployment	Actions	Updated (UTC)
react-native-vision-camera-docs	Ready	Preview	Aug 24, 2026 4:13pm

[mrousavy]

Too overcomplicated. Let's just not have this feature now, the code got too complex to support this. We can ask the CameraX team to add a on focus reset event