base

Fix 2338170: Fix a bug where adding a SAML account would cause the fallback unlock to break.

Adding a SAML account to the system would cause the current test to fail because it expected to have
only one account on the system. Instead, ensure that the device has at lease one non-SAML account.

Fixed update bug where having a single SAML account still showed the "Forgot pattern" button.

Tested:
- Wipe device and add pattern lock
- Add SAML account, verify "forgot pattern" doesn't appear.
- Add GAIA account, verify "forgot pattern" appears.
- Wipe device and add pattern lock
- Add GAIA account, verify "forgot pattern" appears
- Add SAML account, verify "forgot pattern" doesn't go away.