Merge "health 2.0: Check health_loop status for passthrough usage"

static std::unique_ptr<HealthLoopAdapter> health_loop;

int healthd_register_event(int fd, void (*handler)(uint32_t), EventWakeup wakeup) {

    if (!health_loop) return -1;

    auto wrapped_handler = [handler](auto*, uint32_t epevents) { handler(epevents); };

    return health_loop->RegisterEvent(fd, wrapped_handler, wakeup);

}

void healthd_battery_update_internal(bool charger_online) {

    if (!health_loop) return;

    health_loop->AdjustWakealarmPeriods(charger_online);

}