1) Excludes Google from Android/Chrome's default search engine options. This clearly doesn't make sense for Google and I don't think there's an easy way to enforce this. 2) Lists all every search engine that exists on the planet. This still doesn't answer the question who should be placed on the top of the list. 3) Break google up into Android/Chrome and the rest. This is not even an option for EU since their jurisdiction doesn't reach to Google.
Maybe Google can say something like, "all of the profits from this auction will go back to the society!", which practically doesn't make any differences to them since the profit from this auction will likely be a minute fraction compared to the Google's yearly revenues.