[leephillips]

On Android you can set up the phone to send the GV number as your caller-ID. So when calling Lyft they should see your GV number, which will never get associated with anyone else.

EDIT: As Someone1234 points out, however, caller-ID might be irrelevant, and having GV might not help. Another reason to be very selective about what apps you install.

[Someone1234]

Right, but most apps don't "call up" anything. They just gather your phone number using the OS's APIs and then send it via HTTPS/JSON. Caller ID would play no part in that process.