You can’t.
Unless your paper wallet is itself already a 12 or 24 word seed phrase, the usual format (raw wif private key) is not compatible with what Trezor is doing.
From personal experience, I can recommend using Mycelium wallet for Android, because it has (or used to have) a “sweep” feature that lets you send from the paper wallet key directly to another address (your Trezor for example) – without having to create an intermediate hot wallet. It still means importing the private key into your phone, but the exposure time is minimal.