GetSettingsTool
Reads a snapshot of common device settings. Uses only install-time permissions declared by the module manifest (ACCESS_WIFI_STATE, and legacy BLUETOOTH on API <= 30); if either read fails (e.g. a host manifest merge removed the permission) the corresponding flag reports false.
Output keys: screen_brightness (0-255, -1 if unreadable), volume_ring, volume_media, volume_alarm, wifi_enabled, bluetooth_enabled, airplane_mode, auto_rotate.