Make apps uninstallable?

[AC Question]

Okay so when trying to change the launcher on my rooted Huawei Honor 6 I deleted the stock launcher, Huawei Home. I managed to get it back by sideloading a different launcher and then finding Huawei Home online and downloading it. However I want to sell the phone but I know if I reset it ready for the next person, it will delete Huawei Home. Is there away of setting it as one of the preinstalled apps so it cannot be removed?