The same 12 words from the Helium Hotspot app are usable on the Helium Wallet app, so the answer is yes. Your private key’s representation in that seed phrase will continue to be used to identify your HNT, Hotspots, Validators, and Data Credits on the Helium Network. You will be prompted to move your 12 word seed phrase to the new Helium Wallet app when you use the Helium Hotspot app.