🐛 Handle missing Android camera activities

[vinceglb]

Summary

• prevent the Android Compose camera launcher from crashing when no activity handles ACTION_IMAGE_CAPTURE
• route ActivityNotFoundException through the existing failed-launch/null-result path
• add a regression test reproducing the Crashlytics failure

Platforms

• Android (filekit-dialogs-compose)

Documentation

• No documentation changes: the public camera-picker API and expected null-result behavior are unchanged.

Validation

• ./gradlew testAndroidHostTest --console=plain
• ./gradlew check --no-daemon --console=plain
• ktlint filekit-dialogs-compose/src/androidMain/kotlin/io/github/vinceglb/filekit/dialogs/compose/FileKitCompose.android.kt filekit-dialogs-compose/src/androidHostTest/kotlin/io/github/vinceglb/filekit/dialogs/compose/AndroidComposePickerReliabilityTest.kt -R ktlint-compose-0.4.28-all.jar
• independent standards review: 0 findings
• independent spec/correctness review: 0 findings