I repeat, SERIOUS spoilers for the entire AP in this thread! Proceed at your own risk!
What CorvusMask said. It's up to the GM to ensure each player character has some degree of background that will get upended and contribute to the character's shock at discovering their true origins eventually. What exactly that background is entirely subjective, of course, so yes, an android character might choose to start play fresh off the 3d printer. For them, the weirdness might originate from discovering that their doppelgänger whom they were based on is in fact some famous, accomplished pianist or diplomat or what have you.
For an android, also, mass production isn't the only way for them to begin existence. They could be a lovingly created simulacrum that is entirely unique. Remember, within the Pact Worlds proper, androids are technically free and independent, and may not be enslaved, i.e. created for any use without independence. They face old prejudices, of course, but it's really the unethical corporations that still produce androids illegally, mostly outside the Pact Worlds, beyond the reach of law.
SROs are different, though, I believe, as they are more "spontaneously attracted a soul by achieving AI sentience"