Does using VPN or encryption on an Android phone do anything since Google knows who is logged into the phone?

Is it worth paying for a VPN to protect myself from Google tracking since, on an Android phone, you’re logged into a Google account and Google knows who you are, anyway?

Google can still track your activities depending on what Android OS reports to them. A related question would be whether encrypted messaging and email apps protect you on an Android since, once again, the OS is designed by Google and the OS can theoretically see the decrypted messages.