No because discrimination based on color is forbidden by the law. Discrimination on clearly set rules by the company that are not against fundamental laws is allowed. Also, your analogy is way off the mark. Comparing throwing of an app to racial discrimination weakens the very point you're trying to make.

Yes. In a perfect society, one would be free to invite whomever one wants to one's walled garden party without fear that a mob would form to lynch you because your walled garden party does not have a trans-species potatokin.

Comparing discrimination against a protected class of person (in this case, race) to commercial discrimination which is subject to the laws of fair competition and monopoly is irrelevant to the discussion.

Monopolies are subject to restrictions on their operation specifically to protect competition. Unfortunately, around the world over the past 30 years, monopoly regulation has been sadly lacking, except in the EU.

Google could be judged as a monopoly provider of operating system and application services to mobile phone manufacturers. Apple supplies iOS only to its own hardware.

As such, google could be restrained but only in terms of how it deals with the phone manufacturers, not their customers.