- MainActivity: onListen re-emits the current active device and registers
the audio device callback idempotently, so recreated activities resync
instead of freezing the active-device id on a disconnected device.
- servicio_dispositivo_audio: resubscribir() re-opens the event channel;
estado_ecualizador exposes refrescarDispositivoActual() with an
in-flight guard, invoked on app resume and when opening advanced EQ
options, clearing stale green-dot device selections.
- navegacion_auto/servicio_audio: new 'Personalizado' browse tree in
Android Auto (5 band folders, 13 gain steps each) applied live via
setBanda; preset and gain taps persist at device level when
multi-device EQ is active and respect station/matrix overrides,
with apply-before-persist ordering and children-changed notifications.
- l10n: regenerate stale generated localizations; add rxdart as direct
dependency for the subscribeToChildren override.
