how to execute command before the game launch in android

HI i have a packaged game to my android , i want to execute commands before the game start but the GameUserSettings.ini is getting clear after every launch in my android so is there are any other way ?

btw when i execute command r.SetRes in the game my screen get cropped with black boarder in the side and not getting the right fit so any reason why ?

i know i can make a profile in UE4 editor but i want to know how to excute commands before the game launch .

note : my android is mali400 galaxy beam

thanks
MH

any help pls ?

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any help ?