Default [Q] Xperia L Gallery Missing

Hi!!

Suddenly the Gallery app was missing. Not only the icon, the app.
I was checking, and itīs probably that Some Clean Program has erased it.
Now is only the Album App on it.
I couldnīt find the apk to reinstall. Found some, but all with spam... so there were modificated...

Is there anyway to reinstall without the factory reset?

Thanks!!