Debug build for issue #153, Audiobooks do not pause during Android notifications.
This build adds a global Options toggle, enabled by default, to pause audiobook playback for temporary audio-focus interruptions. The behavior follows Android audio focus and is comparable to Audiobookshelf: calls and other focus-taking audio can pause playback, while not every notification sound requests audio focus.
Verification:
- Focused unit tests passed, 35 tests, 0 failures
- Android-test APK assembled successfully
- Device/emulator instrumentation was not run because no ADB target was attached
Manual validation should cover notification sounds, navigation prompts, calls, notification-shade opening, and the enabled/disabled toggle states.