DarthTragedyTheWise has published Reddit which blocks the Google cookie banner on Android devices as well. This is particularly helpful when Firefox is used in private mode. In this case, cookies are automatically deleted after the session and the query pops up again and again.
The addon ublock-origin is required.
Then go to the uBlock settings and add the following to the “My rules” dialogue:
google.*##^responseheader(set-cookie) google.*##+js(cookie-remover, CONSENT)
Then save and, if necessary, delete the browser cache and all saved cookies.